#include "uart.h"
#include "delay.h"
#include "r_cg_adc.h"
#include <string.h>

volatile uint8_t g_uart1_tx_done = 1;
extern volatile uint16_t g_uart1_tx_count;

/* UART1 송신용 내부 버퍼 */
static uint8_t s_uart1_txbuf[1024];

static void UART1_WaitTxIdle(void)
{
    unsigned long guard = 0;

    while (g_uart1_tx_count != 0U) {
        if (guard++ > 3000000UL) {
            break;
        }
    }
}

void uart1_send_string(const char *str)
{
    uint16_t len = 0;

    if (str == 0) return;
    while (str[len] != '\0') len++;

    UART1_WaitTxIdle();
    g_uart1_tx_done = 0;

    if (len >= (uint16_t)sizeof(s_uart1_txbuf)) {
        len = (uint16_t)(sizeof(s_uart1_txbuf) - 1);
    }

    memcpy(s_uart1_txbuf, str, len);
    R_UART1_Send(s_uart1_txbuf, len);
}

void uart1_send_hex(uint8_t val)
{
    static uint8_t hex[2];
    uint8_t high = (uint8_t)((val >> 4) & 0x0F);
    uint8_t low  = (uint8_t)(val & 0x0F);

    hex[0] = (high < 10U) ? (uint8_t)('0' + high) : (uint8_t)('A' + (high - 10U));
    hex[1] = (low  < 10U) ? (uint8_t)('0' + low ) : (uint8_t)('A' + (low  - 10U));

    UART1_WaitTxIdle();
    g_uart1_tx_done = 0;
    R_UART1_Send(hex, 2);
}