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Diffstat (limited to 'src/uart-test/main.c')
-rw-r--r-- | src/uart-test/main.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/uart-test/main.c b/src/uart-test/main.c new file mode 100644 index 0000000..77c17f4 --- /dev/null +++ b/src/uart-test/main.c @@ -0,0 +1,32 @@ +/* + * Test code that just sends the letters 'a' to 'z' over and + * over again using USART1. + * + * Toggles the BLUE LED slowly and the YELLOW LED for every + * character sent. + */ +#include "stm_init.h" + +#define DELAY() HAL_Delay(250) + +int +main() +{ + uint8_t c = 'a'; + uint32_t i = 0; + + stm_init(); + + while (1) + { + HAL_GPIO_TogglePin(LED_PORT, LED_YELLOW); + + HAL_UART_Transmit(&huart1, (uint8_t *) &c, 1, 0xff); + DELAY(); + + if (c++ == 'z') { + c = 'a'; + HAL_GPIO_TogglePin(LED_PORT, LED_BLUE); + } + } +} |