overclocking so SUMP mode can sample up to 50 MHz

README.md

@@ -277,6 +277,7 @@ libco is licensed under the [ISC license](https://opensource.org/licenses/ISC)
   - OpenOCD as XVC client??
 - [x] SUMP logic analyzer mode?
   - see also [this](https://github.com/perexg/picoprobe-sump)
+  - [ ] runtime config options for overclocking, logging
 - [ ] FT2232 emulation mode?
   - watch out, still need a vnd cfg interface! libftdi expects the following stuff: (TODO: acquire detailed protocol description)
     - interface 0 ("A"): index 1, epin 0x02, epout 0x81

bsp/rp2040/m_sump/sump_hw.c

@@ -6,6 +6,7 @@
 #include <hardware/pwm.h>
 #include <hardware/structs/bus_ctrl.h>
 #include <hardware/sync.h>
+#include <hardware/vreg.h>
 #include <pico/binary_info.h>
 #include <pico/platform.h>
 #include <pico/stdlib.h>
@@ -336,6 +337,10 @@ void sump_hw_init(void) {
 }
 
 void sump_hw_stop(void) {
+    // TODO: make this configurable
+    vreg_set_voltage(VREG_VOLTAGE_1_15);
+    set_sys_clock_khz(200000, true);
+
     // IRQ and PIO fast stop
     irq_set_enabled(SAMPLING_DMA_IRQ, false);
     pio_sm_set_enabled(SAMPLING_PIO, SAMPLING_PIO_SM, false);
@@ -355,6 +360,10 @@ void sump_hw_stop(void) {
 }
 
 void sump_hw_deinit(void) {
+    // TODO: make this configurable
+    set_sys_clock_khz(133333, false);
+    vreg_set_voltage(VREG_VOLTAGE_DEFAULT);
+
     sump_hw_stop();
 
     sump_dma_set_irq_channel_mask_enabled(SUMP_DMA_MASK, false);

bsp/rp2040/m_sump/sump_hw.h

@@ -9,11 +9,11 @@
 #define SAMPLING_BITS		(SAMPLING_GPIO_LAST-SAMPLING_GPIO_FIRST+1)
 #define SAMPLING_BYTES		((SAMPLING_BITS+7)/8)
 
-#if PICO_NO_FLASH
-#define SUMP_MEMORY_SIZE	151552/*102400*/	// 150kB
-#else
-#define SUMP_MEMORY_SIZE	204800	// 200kB
-#endif
+//#if PICO_NO_FLASH
+//#define SUMP_MEMORY_SIZE	151552/*102400*/	// 150kB
+//#else
+//#define SUMP_MEMORY_SIZE	204800	// 200kB
+//#endif
 #define SUMP_MAX_CHUNK_SIZE	4096
 
 #endif

src/m_sump/cdc_sump.c

@@ -44,13 +44,14 @@
 #error "Correct sampling width (8 or 16 bits)"
 #endif
 
-#if (SUMP_MEMORY_SIZE % SUMP_MAX_CHUNK_SIZE) != 0
+// TODO: runtime errors?
+/*#if (SUMP_MEMORY_SIZE % SUMP_MAX_CHUNK_SIZE) != 0
 #error "Invalid maximal chunk size!"
 #endif
-// TODO
+
 #if (SUMP_MEMORY_SIZE / SUMP_MAX_CHUNK_SIZE) < SUMP_DMA_CHANNELS
 #error "DMA buffer and DMA channels out of sync!"
-#endif
+#endif*/
 
 #define SUMP_STATE_CONFIG   0
 #define SUMP_STATE_INIT     1