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-rw-r--r--projects/board-test/uart-test.c33
1 files changed, 25 insertions, 8 deletions
diff --git a/projects/board-test/uart-test.c b/projects/board-test/uart-test.c
index f32fde7..6f022f4 100644
--- a/projects/board-test/uart-test.c
+++ b/projects/board-test/uart-test.c
@@ -1,8 +1,9 @@
/*
* Test code that just sends the letters 'a' to 'z' over and
- * over again using USART2.
+ * over again to both the USER and MGMT UARTs. If a CR is received,
+ * it will toggle upper/lower case of the letters being sent.
*
- * Toggles the BLUE LED slowly and the RED LED for every
+ * Toggles the BLUE LED slowly and the GREEN LED for every
* character sent.
*/
#include "stm32f4xx_hal.h"
@@ -15,20 +16,36 @@
int
main()
{
- uint8_t c = 'a';
+ uint8_t tx = 'A';
+ uint8_t rx = 0;
+ uint8_t upper = 0;
stm_init();
while (1)
{
- HAL_GPIO_TogglePin(LED_PORT, LED_GREEN);
+ led_toggle(LED_GREEN);
- uart_send_char(c);
+ uart_send_char2(STM_UART_USER, tx + upper);
+ uart_send_char2(STM_UART_MGMT, tx + upper);
DELAY();
- if (c++ == 'z') {
- c = 'a';
- HAL_GPIO_TogglePin(LED_PORT, LED_BLUE);
+ if (uart_recv_char2(STM_UART_USER, &rx, 0) == HAL_OK ||
+ uart_recv_char2(STM_UART_MGMT, &rx, 0) == HAL_OK) {
+ led_toggle(LED_YELLOW);
+ if (rx == '\r') {
+ upper = upper == 0 ? ('a' - 'A'):0;
+ }
+ }
+
+ if (tx++ == 'Z') {
+ /* linefeed after each alphabet */
+ uart_send_char2(STM_UART_USER, '\r');
+ uart_send_char2(STM_UART_USER, '\n');
+ uart_send_char2(STM_UART_MGMT, '\r');
+ uart_send_char2(STM_UART_MGMT, '\n');
+ tx = 'A';
+ led_toggle(LED_BLUE);
}
}
}