Add TURBO_200MHZ define to support 200Mhz system clock

125Mhz system clock - 31.25Mhz sample rate (logic analyzer)
200Mhz system clock - 50Mhz sample rate (logic analyzer)

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

CMakeLists.txt

@@ -21,6 +21,11 @@ if (DEFINED ENV{PICOPROBE_LED})
         target_compile_definitions(picoprobe PRIVATE PICOPROBE_LED=$ENV{PICOPROBE_LED})
 endif()
 
+if (DEFINED ENV{TURBO_200MHZ})
+        message("TURBO_200MHZ is defined as " $ENV{TURBO_200MHZ})
+        target_compile_definitions(picoprobe PRIVATE TURBO_200MHZ=$ENV{TURBO_200MHZ})
+endif()
+
 set(DBG_PIN_COUNT=4)
 
 pico_generate_pio_header(picoprobe ${CMAKE_CURRENT_LIST_DIR}/src/probe.pio)

src/main.c

@@ -31,6 +31,10 @@
 #include "tusb.h"
 
 #include "picoprobe_config.h"
+#if TURBO_200MHZ
+#include "pico/stdlib.h"
+#include "hardware/vreg.h"
+#endif
 #include "probe.h"
 #include "cdc_uart.h"
 #include "cdc_sump.h"
@@ -49,6 +53,11 @@ void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* line_coding) {
 
 int main(void) {
 
+#if TURBO_200MHZ
+    vreg_set_voltage(VREG_VOLTAGE_1_15);
+    set_sys_clock_khz(200000, true);
+#endif
+
     board_init();
     usb_serial_init();
     cdc_uart_init();

src/picoprobe_config.h

@@ -45,6 +45,9 @@
 #define picoprobe_dump(format,...) ((void)0)
 #endif
 
+#if false
+#define TURBO_200MHZ 1
+#endif
 
 // PIO config
 #define PROBE_SM 0