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569 lines
12 KiB
569 lines
12 KiB
#include "owi.h"
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#include "delay.h"
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#include "r_cg_wdt.h"
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#include <string.h>
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#include <stdio.h>
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#include "uart.h"
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#ifndef OWI_STRONG_DRIVE_HIGH_US
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#define OWI_STRONG_DRIVE_HIGH_US 5u
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#endif
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/* 내부 상태 */
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static uint32_t bit_period_us = OWI_BIT_PERIOD_US;
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static uint8_t g_owi_timeout_latched = 0;
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static uint16_t g_owi_last_timeout_byte_index = 0xFFFFu;
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static uint8_t g_owi_last_timeout_bit_index = 0xFFu;
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static uint16_t g_owi_current_read_byte_index = 0u;
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static uint8_t g_owi_current_read_bit_index = 0u;
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/* =========================================================
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* GPIO helpers (P70 / HW Open-Drain)
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* - LOW : 출력 모드 + 0
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* - HIGH : 입력(Hi-Z)로 release
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* ========================================================= */
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void GPIO_Clear(void)
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{
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OWI_PORT_POM |= (uint8_t)OWI_PIN_MASK;
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OWI_PORT_P &= (uint8_t)~OWI_PIN_MASK;
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OWI_PORT_PM &= (uint8_t)~OWI_PIN_MASK;
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}
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void GPIO_Input(void)
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{
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OWI_PORT_POM |= (uint8_t)OWI_PIN_MASK;
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OWI_PORT_P |= (uint8_t)OWI_PIN_MASK;
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OWI_PORT_PM |= (uint8_t)OWI_PIN_MASK;
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}
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int GPIO_Read(void)
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{
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return (OWI_PORT_P & (uint8_t)OWI_PIN_MASK) ? 1 : 0;
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}
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static void OWI_Release(void)
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{
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OWI_PORT_POM |= (uint8_t)OWI_PIN_MASK;
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OWI_PORT_P |= (uint8_t)OWI_PIN_MASK;
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OWI_PORT_PM |= (uint8_t)OWI_PIN_MASK;
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}
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static void GPIO_StrongDriveHighKick(uint32_t kick_us)
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{
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OWI_Release();
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if (!GPIO_Read()) {
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return;
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}
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OWI_PORT_POM &= (uint8_t)~OWI_PIN_MASK;
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OWI_PORT_P |= (uint8_t)OWI_PIN_MASK;
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OWI_PORT_PM &= (uint8_t)~OWI_PIN_MASK;
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delay_us(kick_us);
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OWI_PORT_POM |= (uint8_t)OWI_PIN_MASK;
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OWI_Release();
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}
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void GPIO_ForceHighKick(void)
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{
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GPIO_StrongDriveHighKick(OWI_STRONG_DRIVE_HIGH_US);
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}
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static void OWI_DriveLow(void)
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{
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OWI_PORT_POM |= (uint8_t)OWI_PIN_MASK;
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OWI_PORT_P &= (uint8_t)~OWI_PIN_MASK;
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OWI_PORT_PM &= (uint8_t)~OWI_PIN_MASK;
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}
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/* =========================================================
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* Diagnostics
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* ========================================================= */
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uint8_t OWI_HasTimeout(void)
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{
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return g_owi_timeout_latched;
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}
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void OWI_ClearTimeout(void)
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{
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g_owi_timeout_latched = 0;
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g_owi_last_timeout_byte_index = 0xFFFFu;
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g_owi_last_timeout_bit_index = 0xFFu;
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}
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uint16_t OWI_GetLastTimeoutByteIndex(void)
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{
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return g_owi_last_timeout_byte_index;
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}
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uint8_t OWI_GetLastTimeoutBitIndex(void)
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{
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return g_owi_last_timeout_bit_index;
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}
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/* =========================================================
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* OWI Init
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* ========================================================= */
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void OWI_Init(uint32_t bit_time_us)
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{
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bit_period_us = bit_time_us;
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(void)bit_period_us;
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OWI_PORT_POM |= (uint8_t)OWI_PIN_MASK;
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OWI_PORT_PU &= (uint8_t)~OWI_PIN_MASK;
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OWI_ClearTimeout();
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GPIO_Input();
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}
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/* =========================================================
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* Start/Stop/Secure
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* ========================================================= */
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void OWI_Start(void)
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{
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GPIO_Clear();
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delay_us(TSTART_HOLD);
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GPIO_Input();
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delay_us(TBIT);
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}
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void OWI_Stop(void)
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{
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GPIO_Input();
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delay_us(TSTOP_LOW);
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delay_us(TIDLE);
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}
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static void OWI_StopWrite(void)
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{
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OWI_Release();
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delay_us(TSTOP_LOW);
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delay_us(TIDLE);
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}
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static void OWI_StopRead(void)
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{
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OWI_DriveLow();
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delay_us(TSTOP_LOW);
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OWI_Release();
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delay_us(TIDLE);
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}
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static uint8_t OWI_WaitFirstBitStart(void)
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{
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int timeout;
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timeout = (int)(bit_period_us * 4u);
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/* 첫 번째 HIGH->LOW 시작을 기다림 */
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while (GPIO_Read() && timeout-- > 0) {
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delay_us(1u);
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}
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if (timeout <= 0) {
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if (!g_owi_timeout_latched) {
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g_owi_timeout_latched = 1;
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g_owi_last_timeout_byte_index = 0u;
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g_owi_last_timeout_bit_index = 0u;
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}
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return 0u;
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}
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return 1u;
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}
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static uint8_t OWI_WaitForFallingEdge(uint16_t byte_index, uint8_t bit_index)
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{
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int timeout = (int)(bit_period_us * 4u);
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while (GPIO_Read() && timeout-- > 0) {
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delay_us(1u);
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}
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if (timeout <= 0) {
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if (!g_owi_timeout_latched) {
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g_owi_timeout_latched = 1;
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g_owi_last_timeout_byte_index = byte_index;
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g_owi_last_timeout_bit_index = bit_index;
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}
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return 0u;
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}
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return 1u;
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}
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static uint8_t OWI_ReadByte_StreamSynced(uint16_t byte_index)
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{
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uint8_t data = 0;
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int b;
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for (b = 7; b >= 0; b--) {
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uint8_t bit_index = (uint8_t)(7 - b);
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uint8_t bit;
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g_owi_current_read_byte_index = byte_index;
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g_owi_current_read_bit_index = bit_index;
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/* 슬롯 시작 후 중앙 샘플 */
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delay_us(bit_period_us / 2u);
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bit = GPIO_Read() ? 1u : 0u;
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data |= (uint8_t)(bit << b);
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/* 남은 반 슬롯 대기 */
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delay_us(bit_period_us / 2u);
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}
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return data;
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}
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void OWI_SecureStop(void)
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{
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int i;
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GPIO_Clear();
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delay_us(SECURE_HIGH);
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for (i = 0; i < (int)SECURE_TOGGLE_COUNT; i++) {
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GPIO_Input();
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delay_us(SECURE_TOGGLE_HIGH);
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GPIO_Clear();
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delay_us(SECURE_TOGGLE_LOW);
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}
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GPIO_Input();
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delay_us(SECURE_HIGH);
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GPIO_Clear();
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delay_us(TSTART_HOLD);
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GPIO_Input();
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}
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/* =========================================================
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* Bit/Byte IO
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* ========================================================= */
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void OWI_WriteBit(int bit)
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{
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uint32_t t_low = bit ? (uint32_t)TLOW_1 : (uint32_t)TLOW_0;
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uint32_t t_high = (uint32_t)TBIT - t_low;
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/* HIGH 구간 */
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OWI_Release();
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delay_us(t_high);
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/* LOW 구간 */
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OWI_DriveLow();
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delay_us(t_low);
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/* 다음 슬롯 시작 전 반드시 release */
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OWI_Release();
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}
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void OWI_WriteByte(uint8_t data)
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{
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int i;
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for (i = 7; i >= 0; i--) {
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OWI_WriteBit((data >> i) & 0x01u);
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}
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GPIO_Input();
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}
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uint8_t OWI_ReadBit(void)
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{
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int timeout;
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int low_width = 0;
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/* 1) 라인이 HIGH가 될 때까지 정리 */
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timeout = (int)(bit_period_us * 2u);
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while (!GPIO_Read() && timeout-- > 0) {
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delay_us(1u);
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}
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if (timeout <= 0) {
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if (!g_owi_timeout_latched) {
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g_owi_timeout_latched = 1;
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g_owi_last_timeout_byte_index = g_owi_current_read_byte_index;
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g_owi_last_timeout_bit_index = g_owi_current_read_bit_index;
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}
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return 0u;
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}
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/* 2) 다음 LOW 시작 대기 */
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timeout = (int)(bit_period_us * 2u);
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while (GPIO_Read() && timeout-- > 0) {
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delay_us(1u);
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}
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if (timeout <= 0) {
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if (!g_owi_timeout_latched) {
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g_owi_timeout_latched = 1;
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g_owi_last_timeout_byte_index = g_owi_current_read_byte_index;
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g_owi_last_timeout_bit_index = g_owi_current_read_bit_index;
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}
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return 0u;
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}
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/* 3) LOW가 유지되는 시간을 직접 측정 */
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while (!GPIO_Read() && low_width < (int)(bit_period_us * 2u)) {
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delay_us(1u);
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low_width++;
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}
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/* 4) LOW 폭 기준으로 판정
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- 짧으면 1
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- 길면 0
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threshold ~= TBIT/2
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*/
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return (low_width < (int)(bit_period_us / 2u)) ? 1u : 0u;
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}
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uint8_t OWI_ReadByte(void)
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{
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uint8_t data = 0;
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int i;
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for (i = 7; i >= 0; i--) {
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g_owi_current_read_bit_index = (uint8_t)(7 - i);
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data |= (uint8_t)(OWI_ReadBit() << i);
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if (OWI_HasTimeout()) {
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break;
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}
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}
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return data;
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}
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/* =========================================================
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* Debug Print
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* ========================================================= */
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void OWI_T_ReadBytesAndPrint(int length)
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{
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uint8_t buf[129];
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int i;
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char uart_buf[8];
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char tmp_buf[8];
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uint8_t va0, va1;
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if (length > 129) length = 129;
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if (length <= 0) return;
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OWI_ClearTimeout();
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for (i = 0; i < length; i++) {
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R_WDT_Restart();
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g_owi_current_read_byte_index = (uint16_t)i;
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buf[i] = OWI_ReadByte();
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if (OWI_HasTimeout()) {
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i++;
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break;
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}
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}
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sprintf(uart_buf, "%02X ", buf[0]);
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strcpy(tmp_buf, uart_buf);
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HOST_PRINT(tmp_buf);
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for (i = 1; i < length; i += 2) {
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va0 = buf[i];
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va1 = (uint8_t)((i + 1 < length) ? buf[i + 1] : 0u);
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delay_us(200);
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sprintf(uart_buf, "%02X%02X ", va0, va1);
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strcpy(tmp_buf, uart_buf);
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HOST_PRINT(tmp_buf);
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delay_us(200);
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}
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}
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/* =========================================================
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* Raw helpers
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* ========================================================= */
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static void owi_result_init(owi_io_result_t *r)
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{
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if (!r) return;
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memset(r, 0, sizeof(*r));
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r->ok = 1;
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r->timeout_byte_index = 0xFFFFu;
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r->timeout_bit_index = 0xFFu;
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}
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static void owi_result_latch_timeout(owi_io_result_t *r)
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{
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if (!r) return;
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if (OWI_HasTimeout()) {
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r->ok = 0;
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r->timeout = 1;
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r->timeout_byte_index = OWI_GetLastTimeoutByteIndex();
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r->timeout_bit_index = OWI_GetLastTimeoutBitIndex();
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}
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}
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void OWI_T_CommandModeRaw(const uint8_t *tx_data, uint8_t tx_len, uint8_t id, owi_io_result_t *r)
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{
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int i;
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owi_result_init(r);
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//delay_us(200);
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OWI_Init(OWI_BIT_PERIOD_US);
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OWI_ClearTimeout();
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OWI_SecureStop();
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OWI_WriteByte((uint8_t)(id << 1));
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for (i = 0; i < (int)tx_len; i++) {
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OWI_WriteByte(tx_data[i]);
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}
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OWI_Stop();
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owi_result_latch_timeout(r);
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}
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void OWI_CommandModeRaw(const uint8_t *tx_data, uint8_t tx_len, uint8_t id, owi_io_result_t *r)
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{
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int i;
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owi_result_init(r);
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OWI_Init(OWI_BIT_PERIOD_US);
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OWI_ClearTimeout();
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OWI_SecureStop();
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OWI_WriteByte((uint8_t)(id << 1));
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for (i = 0; i < (int)tx_len; i++) {
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OWI_WriteByte(tx_data[i]);
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}
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OWI_Stop();
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owi_result_latch_timeout(r);
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}
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void OWI_ReadBytesRaw(int length, uint8_t id, owi_io_result_t *r)
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{
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int i;
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int max_len;
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uint8_t is_long_read;
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if (!r) return;
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owi_result_init(r);
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OWI_Init(OWI_BIT_PERIOD_US);
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if (length <= 0) {
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r->ok = 0;
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return;
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}
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max_len = (int)OWI_IO_MAX_BYTES;
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if (length > max_len) {
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length = max_len;
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}
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r->read_len = (uint16_t)length;
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OWI_ClearTimeout();
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is_long_read = (length >= 119) ? 1u : 0u;
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R_WDT_Restart();
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OWI_SecureStop();
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OWI_WriteByte((uint8_t)((id << 1) | 1u));
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/* 기존 잘 되던 값 유지 */
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delay_us(100u);
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/* 첫 falling edge를 한 번 잡는다 */
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R_WDT_Restart();
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if (!OWI_WaitForFallingEdge(0u, 0u)) {
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owi_result_latch_timeout(r);
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OWI_StopRead();
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return;
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}
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for (i = 0; i < length; i++) {
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R_WDT_Restart();
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/* long read만 주기적 재동기화 */
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if (is_long_read && i == (length - 50)) {
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R_WDT_Restart();
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if (!OWI_WaitForFallingEdge((uint16_t)i, 0u)) {
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owi_result_latch_timeout(r);
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break;
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}
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}
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r->data[i] = OWI_ReadByte_StreamSynced((uint16_t)i);
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if (OWI_HasTimeout()) {
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owi_result_latch_timeout(r);
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break;
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}
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}
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OWI_StopRead();
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}
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void OWI_disable(void)
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{
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HOST_PRINT("51\r\n");
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}
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void OWI_T_CommandMode(const uint8_t *tx_data, uint8_t tx_len, uint8_t id)
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{
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owi_io_result_t r;
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(void)r;
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OWI_T_CommandModeRaw(tx_data, tx_len, id, &r);
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HOST_PRINT("51\r\n");
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}
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void OWI_CommandMode(const uint8_t *tx_data, uint8_t tx_len, uint8_t id)
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{
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owi_io_result_t r;
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(void)r;
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OWI_CommandModeRaw(tx_data, tx_len, id, &r);
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HOST_PRINT("51\r\n");
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}
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void OWI_ReadBytesAndPrint(int length, uint8_t id)
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{
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owi_io_result_t r;
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char out[(2 * OWI_IO_MAX_BYTES) + 40];
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int i;
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uint16_t p = 0;
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|
|
if (length <= 0) {
|
|
HOST_PRINT("Err:read_len_nonzero\r\n");
|
|
return;
|
|
}
|
|
|
|
OWI_ReadBytesRaw(length, id, &r);
|
|
|
|
if (r.read_len == 0) {
|
|
HOST_PRINT("Err:read_len_nonzero\r\n");
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < (int)r.read_len; i++) {
|
|
uint8_t b = r.data[i];
|
|
out[p++] = "0123456789ABCDEF"[b >> 4];
|
|
out[p++] = "0123456789ABCDEF"[b & 0x0F];
|
|
}
|
|
|
|
if (r.timeout) {
|
|
p += (uint16_t)sprintf(&out[p], " !TO(B%u b%u)",
|
|
(unsigned)r.timeout_byte_index,
|
|
(unsigned)r.timeout_bit_index);
|
|
}
|
|
|
|
out[p++] = '\r';
|
|
out[p++] = '\n';
|
|
out[p] = '\0';
|
|
|
|
HOST_PRINT(out);
|
|
}
|
|
|