cdc_uart: add RTS and DTR pins

Author: cyber-murmel

src/cdc_uart.c

@@ -43,6 +43,13 @@ void cdc_uart_init(void) {
  gpio_set_pulls(PICOPROBE_UART_TX, 1, 0);
  gpio_set_pulls(PICOPROBE_UART_RX, 1, 0);
  uart_init(PICOPROBE_UART_INTERFACE, PICOPROBE_UART_BAUDRATE);
+
+ gpio_init(PICOPROBE_UART_DTR);
+ gpio_init(PICOPROBE_UART_RTS);
+ gpio_set_dir(PICOPROBE_UART_DTR, GPIO_OUT);
+ gpio_set_dir(PICOPROBE_UART_RTS, GPIO_OUT);
+ gpio_put(PICOPROBE_UART_DTR, 1);
+ gpio_put(PICOPROBE_UART_RTS, 1);
 }
 
 void cdc_task(void)
@@ -117,6 +124,9 @@ void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* line_coding)
 
 void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
 {
+ gpio_put(PICOPROBE_UART_DTR, !dtr);
+ gpio_put(PICOPROBE_UART_RTS, !rts);
+
  /* CDC drivers use linestate as a bodge to activate/deactivate the interface.
  * Resume our UART polling on activate, stop on deactivate */
  if (!dtr && !rts)

src/picoprobe_config.h

@@ -58,6 +58,8 @@
 // UART config
 #define PICOPROBE_UART_TX 4
 #define PICOPROBE_UART_RX 5
+#define PICOPROBE_UART_RTS 7
+#define PICOPROBE_UART_DTR 8
 #define PICOPROBE_UART_INTERFACE uart1
 #define PICOPROBE_UART_BAUDRATE 115200