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[ISSUE-32] using DPORT UART FIFO register for uart fifo read operation. #33

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Merged
SzigetiJ merged 1 commit into from
Oct 30, 2025
Merged

[ISSUE-32] using DPORT UART FIFO register for uart fifo read operation. #33

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3 changes: 2 additions & 1 deletion examples/0ledctrl/ledctrl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ const uint64_t gu64tckSchedulePeriod = (CLK_FREQ_HZ / SCHEDULE_FREQ_HZ);

// ==================== Local Data ================
static UART_Type *gpsUART0 = &gsUART0;
static UART_Type *gpsUART0M = &gsUART0Mapped;

// Implementation

Expand All @@ -55,7 +56,7 @@ static void _ledctrl_cycle(uint64_t u64Ticks) {

if (u64NextTick <= u64Ticks) {
while (0 < (gpsUART0->STATUS & 0xff)) {
char cCtrl = gpsUART0->FIFO & 0xff;
char cCtrl = gpsUART0M->FIFO & 0xff;
switch (cCtrl) {
case 'y':
gpio_reg_setbit(&gsGPIO.OUT_W1TS, LED1_GPIO);
Expand Down
42 changes: 24 additions & 18 deletions examples/3prog1/prog.c
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,7 @@
#define INC_PERIOD_MS 1900U
#define I2CSCAN_PERIOD_MS 8600U
#define ALARM_PERIOD_MS 4500U
#define UARTCTRL_PERIOD_MS 503U

#define BH1750_RETRY_WAIT_HMS 10U

Expand Down Expand Up @@ -122,6 +123,7 @@ static void _bme280_print_result(const SBme280TPH *psRes, uint32_t u32TFine);
static void _bme280_cycle(uint64_t u64Ticks);
static void _log_cycle(uint64_t u64Ticks);
static void _inc_cycle(uint64_t u64Ticks);
static void _uartctrl_cycle(uint64_t u64Ticks);

// =================== Global constants ================
const bool gbStartAppCpu = START_APP_CPU;
Expand All @@ -134,6 +136,7 @@ static const char message_sfx[] = " ms\r\n";
static const char acLedPhase[] = "*O";

static UART_Type *gpsUART0 = &gsUART0;
static UART_Type *gpsUART0M = &gsUART0Mapped; // for FIFO read
static volatile bool gbLedState = false;
static volatile EDisplayState geOledState = DISPLAY_INIT;
static volatile uint64_t gu64tckAlarmCur = 0;
Expand Down Expand Up @@ -192,24 +195,6 @@ static void _flush_message(uint64_t u64tckTimestamp) {
*(buf_e++) = ' ';
buf_e = print_dec(buf_e, gau32IncVal[i]);
}
if (false) {
*(buf_e++) = ' ';
buf_e = print_hex32(buf_e, gpio_regs()->FUNC_OUT_SEL_CFG[I2C0_SCL_GPIO]);
*(buf_e++) = ' ';
buf_e = print_hex32(buf_e, gpio_regs()->FUNC_OUT_SEL_CFG[I2C0_SDA_GPIO]);
*(buf_e++) = ' ';
buf_e = print_hex32(buf_e, i2c_regs(I2C0)->SR);
*(buf_e++) = ' ';
buf_e = print_hex32(buf_e, i2c_regs(I2C0)->FIFO_CONF);
*(buf_e++) = ' ';
buf_e = print_hex32(buf_e, i2c_regs(I2C0)->INT_RAW);
*(buf_e++) = ' ';
buf_e = print_hex32(buf_e, i2c_regs(I2C0)->INT_ST);
*(buf_e++) = ' ';
buf_e = print_hex8(buf_e, u8Phase & 0x0f);
*(buf_e++) = ':';
buf_e = print_hex32(buf_e, i2c_regs(I2C0)->COMD[u8Phase & 0x0f]);
}
} else {
// some internal call causes WDT
snprintf(buf, LOG_BUFLEN, "%s%"PRIu64"%s", message_pfx, u64tckTimestamp, message_sfx);
Expand Down Expand Up @@ -588,6 +573,26 @@ static void _i2cscan_cycle(uint64_t u64Ticks) {
}
}

static void _uartctrl_cycle(uint64_t u64Ticks) {
static uint64_t u64NextTick = 0;

if (u64NextTick <= u64Ticks) {
while (0 < (gpsUART0->STATUS & 0xff)) {
uint32_t u32msNow = u64Ticks / TICKS_PER_MS;
char cCtrl = gpsUART0M->FIFO & 0xff;
switch (cCtrl) {
case 'i': // I2C status
uart_printf(gpsUART0, "[%d] GPIO_FUNC_OUT: %08X %08X", u32msNow, gpio_regs()->FUNC_OUT_SEL_CFG[I2C0_SCL_GPIO], gpio_regs()->FUNC_OUT_SEL_CFG[I2C0_SDA_GPIO]);
uart_printf(gpsUART0, "\tI2C Regs: %08X %08X %08X %08X\r\n", i2c_regs(I2C0)->SR, i2c_regs(I2C0)->FIFO_CONF, i2c_regs(I2C0)->INT_RAW, i2c_regs(I2C0)->INT_ST);
break;
default:
uart_printf(gpsUART0, "[%d] `%c' command not recognized\r\n", u32msNow, cCtrl);
}
}
u64NextTick += MS2TICKS(UARTCTRL_PERIOD_MS);
}
}

static void _schedule_isr() {
gsPCbDesc.eCpu = xt_utils_get_core_id() ? CPU_APP : CPU_PRO;
timg_callback_at(gsPCbDesc.u64tckAlarmCur, gsPCbDesc.eCpu, gsPCbDesc.sTimer, gsPCbDesc.u8Int, &_timer_isr, (void*) &gsPCbDesc);
Expand Down Expand Up @@ -624,4 +629,5 @@ void prog_cycle_pro(uint64_t u64tckNow) {
_i2cscan_cycle(u64tckNow);
_bh1750_cycle(u64tckNow);
_bme280_cycle(u64tckNow);
_uartctrl_cycle(u64tckNow);
}