fixed UART

cesanta · Apr 8, 2024 · 79669dc · 79669dc
1 parent 625a426
commit 79669dc
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Showing 2 changed files with 8 additions and 6 deletions.
diff --git a/examples/infineon/infineon-xmc7200/hal.h b/examples/infineon/infineon-xmc7200/hal.h
@@ -137,11 +137,15 @@ static inline void uart_init(volatile CySCB_Type *uart, unsigned long baud) {
   if (div == 0) div = 1;
   frac = SYS_FREQUENCY % (baud * ovs);
   frac = (frac * 100) / (baud * ovs);
-  PERI_PCLK->GR[1].DIV_CMD = (3 << PERI_PCLK_GR_DIV_CMD_TYPE_SEL_Pos);
+  PERI_PCLK->GR[1].DIV_CMD = (3 << PERI_PCLK_GR_DIV_CMD_TYPE_SEL_Pos) |
+                             PERI_PCLK_GR_DIV_CMD_PA_DIV_SEL_Msk |
+                             PERI_PCLK_GR_DIV_CMD_PA_TYPE_SEL_Msk;
   PERI_PCLK->GR[1].DIV_CMD |= PERI_PCLK_GR_DIV_CMD_DISABLE_Msk; // disable divider
   PERI_PCLK->GR[1].DIV_24_5_CTL[0] = (((uint8_t) (div - 1)) << PERI_PCLK_GR_DIV_24_5_CTL_INT24_DIV_Pos) |
                                      (frac << PERI_PCLK_GR_DIV_24_5_CTL_FRAC5_DIV_Pos);
-  PERI_PCLK->GR[1].DIV_CMD = (3 << PERI_PCLK_GR_DIV_CMD_TYPE_SEL_Pos);
+  PERI_PCLK->GR[1].DIV_CMD = (3 << PERI_PCLK_GR_DIV_CMD_TYPE_SEL_Pos) |
+                             PERI_PCLK_GR_DIV_CMD_PA_DIV_SEL_Msk |
+                             PERI_PCLK_GR_DIV_CMD_PA_TYPE_SEL_Msk;;
   PERI_PCLK->GR[1].DIV_CMD |= PERI_PCLK_GR_DIV_CMD_ENABLE_Msk; // enable divider
   PERI_PCLK->GR[1].CLOCK_CTL[PCLK_SCB3_CLOCK & 0xff] = 3 << PERI_PCLK_GR_CLOCK_CTL_TYPE_SEL_Pos;  // connect SCB3 to div_24_5_ctl[0]
 
@@ -159,9 +163,8 @@ static inline void uart_init(volatile CySCB_Type *uart, unsigned long baud) {
 
 static inline void uart_write_byte(volatile CySCB_Type *uart, uint8_t byte) {
   (void) byte; (void) uart;
-  //while((uart->INTR_TX & SCB_INTR_TX_EMPTY_Msk) == 0) spin(1);
+  while((uart->INTR_TX & SCB_INTR_TX_EMPTY_Msk) == 0) spin(1);
   uart->TX_FIFO_WR = byte;
-  spin(1000);
 }
 
 static inline void uart_write_buf(volatile CySCB_Type *uart, char *buf, size_t len) {

diff --git a/examples/infineon/infineon-xmc7200/main.c b/examples/infineon/infineon-xmc7200/main.c
@@ -35,8 +35,7 @@ int main(void) {
       now = mg_millis();
       gpio_toggle(LED2);
 
-      // for now, write only a character to UART every second
-      uart_write_byte(UART_DEBUG, 'a');
+      uart_write_buf(UART_DEBUG, "hello\n", 6);
     }
   }