cdc_uart: add RTS and DTR pins

include/board_debugprobe_config.h

@@ -50,6 +50,4 @@
 #define PICOPROBE_UART_RX_LED 7
 #define PICOPROBE_UART_TX_LED 8
 
-#define PROBE_PRODUCT_STRING "Debug Probe (CMSIS-DAP)"
-
 #endif

include/board_example_config.h

@@ -68,6 +68,9 @@
 #define PICOPROBE_UART_RX 5
 #define PICOPROBE_UART_INTERFACE uart1
 #define PICOPROBE_UART_BAUDRATE 115200
+/* Flow control - some or all of these can be omitted if not used */
+#define PICOPROBE_UART_RTS 9
+#define PICOPROBE_UART_DTR 10
 #endif
 
 /* LED config - some or all of these can be omitted if not used */
@@ -77,6 +80,4 @@
 #define PICOPROBE_UART_RX_LED 7
 #define PICOPROBE_UART_TX_LED 8
 
-#define PROBE_PRODUCT_STRING "Example Debug Probe"
-
 #endif

include/board_pico_config.h

@@ -35,7 +35,7 @@
 #define PROBE_PIN_SWCLK (PROBE_PIN_OFFSET + 0) // 2
 #define PROBE_PIN_SWDIO (PROBE_PIN_OFFSET + 1) // 3
 // Target reset config
-#define PROBE_PIN_RESET 1
+#define PROBE_PIN_RESET 0
 
 // UART config
 #define PICOPROBE_UART_TX 4
@@ -45,6 +45,4 @@
 
 #define PICOPROBE_USB_CONNECTED_LED 25
 
-#define PROBE_PRODUCT_STRING "Picoprobe (CMSIS-DAP)"
-
 #endif

src/cdc_uart.c

@@ -54,6 +54,17 @@ 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);
+
+#ifdef PICOPROBE_UART_RTS
+    gpio_init(PICOPROBE_UART_RTS);
+    gpio_set_dir(PICOPROBE_UART_RTS, GPIO_OUT);
+    gpio_put(PICOPROBE_UART_RTS, 1);
+#endif
+#ifdef PICOPROBE_UART_DTR
+    gpio_init(PICOPROBE_UART_DTR);
+    gpio_set_dir(PICOPROBE_UART_DTR, GPIO_OUT);
+    gpio_put(PICOPROBE_UART_DTR, 1);
+#endif
 }
 
 void cdc_task(void)
@@ -139,7 +150,7 @@ void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* line_coding)
   vTaskSuspend(uart_taskhandle);
   interval = MAX(1, micros / ((1000 * 1000) / configTICK_RATE_HZ));
   debounce_ticks = MAX(1, configTICK_RATE_HZ / (interval * DEBOUNCE_MS));
-  picoprobe_info("New baud rate %ld micros %ld interval %lu\n",
+  picoprobe_info("New baud rate %d micros %d interval %u\n",
                   line_coding->bit_rate, micros, interval);
   uart_deinit(PICOPROBE_UART_INTERFACE);
   tud_cdc_write_clear();
@@ -150,6 +161,13 @@ 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)
 {
+#ifdef PICOPROBE_UART_RTS
+  gpio_put(PICOPROBE_UART_RTS, !rts);
+#endif
+#ifdef PICOPROBE_UART_DTR
+  gpio_put(PICOPROBE_UART_DTR, !dtr);
+#endif
+
   /* 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/main.c

@@ -99,7 +99,6 @@ int main(void) {
     tusb_init();
 
     DAP_Setup();
-    stdio_uart_init();
 
     led_init();
 

src/picoprobe_config.h

@@ -26,47 +26,29 @@
 #ifndef PICOPROBE_H_
 #define PICOPROBE_H_
 
-#include "FreeRTOS.h"
-#include "task.h"
-
 #if false
-#define picoprobe_info(format,args...) \
+#define picoprobe_info(format,args...) printf(format, ## args)
-do { \
-	vTaskSuspendAll(); \
-	printf(format, ## args); \
-	xTaskResumeAll(); \
-} while (0)
 #else
 #define picoprobe_info(format,...) ((void)0)
 #endif
 
 
 #if false
-#define picoprobe_debug(format,args...) \
+#define picoprobe_debug(format,args...) printf(format, ## args)
-do { \
-	vTaskSuspendAll(); \
-	printf(format, ## args); \
-	xTaskResumeAll(); \
-} while (0)
 #else
 #define picoprobe_debug(format,...) ((void)0)
 #endif
 
 #if false
-#define picoprobe_dump(format,args...)\
+#define picoprobe_dump(format,args...) printf(format, ## args)
-do { \
-	vTaskSuspendAll(); \
-	printf(format, ## args); \
-	xTaskResumeAll(); \
-} while (0)
 #else
 #define picoprobe_dump(format,...) ((void)0)
 #endif
 
 // TODO tie this up with PICO_BOARD defines in the main SDK
 
-#include "board_pico_config.h"
+//#include "board_pico_config.h"
-//#include "board_debugprobe_config.h"
+#include "board_debugprobe_config.h"
 //#include "board_example_config.h"
 
 

src/usb_descriptors.c

@@ -133,7 +133,7 @@ char const* string_desc_arr [] =
 {
   (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
   "Raspberry Pi", // 1: Manufacturer
-  PROBE_PRODUCT_STRING, // 2: Product
+  "Debug Probe (CMSIS-DAP)", // 2: Product
   usb_serial,     // 3: Serial, uses flash unique ID
   "CMSIS-DAP v1 Interface", // 4: Interface descriptor for HID transport
   "CMSIS-DAP v2 Interface", // 5: Interface descriptor for Bulk transport