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Add voltage control and test notebooks for RP2040/RP2350 #36

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Merged
dihm merged 1 commit into from
Aug 20, 2025
Merged

Add voltage control and test notebooks for RP2040/RP2350 #36

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2 changes: 1 addition & 1 deletion prawnblaster/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,7 @@ foreach (overclock IN LISTS overclocks)
endif()

# Pull in our pico_stdlib which aggregates commonly used features
target_link_libraries(${firmware_name} pico_stdlib hardware_pio pico_multicore pico_unique_id hardware_clocks hardware_dma tinyusb_device tinyusb_board)
target_link_libraries(${firmware_name} pico_stdlib hardware_pio pico_multicore pico_unique_id hardware_clocks hardware_dma hardware_vreg tinyusb_device tinyusb_board)
target_include_directories(${firmware_name} PRIVATE .)

# create map/bin/hex/uf2 file etc.
Expand Down
26 changes: 24 additions & 2 deletions prawnblaster/prawnblaster.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@
#include "hardware/clocks.h"
#include "hardware/structs/pll.h"
#include "hardware/structs/clocks.h"
#include "hardware/vreg.h"

#include "pseudoclock.pio.h"

Expand Down Expand Up @@ -756,6 +757,14 @@ void measure_freqs(void)
#endif
}

void measure_voltage(void)
{
enum vreg_voltage vreg_val = vreg_get_voltage();
// Voltage is
float voltage = 0.55f + (vreg_val * 0.05f);
fast_serial_printf("voltage = %.2fV\r\n", voltage);
}

void resus_callback(void)
{
// Switch back to internal clock with the dfeault frequency
Expand Down Expand Up @@ -802,6 +811,11 @@ void loop()
{
measure_freqs();
fast_serial_printf("ok\r\n");
}
else if (strncmp(readstring, "getvolts", 8) == 0)
{
measure_voltage();
fast_serial_printf("ok\r\n");
}
else if (strncmp(readstring, "abort", 5) == 0)
{
Expand Down Expand Up @@ -1016,14 +1030,22 @@ void loop()
else if (strncmp(readstring, "setclock", 8) == 0)
{
unsigned int src; // 0 = internal, 1=GPIO pin 20, 2=GPIO pin 22
unsigned int freq; // in Hz (up to 133 or 150 MHz depending on board)
unsigned int freq; // in Hz (up to 133 or 200 MHz depending on board)
int parsed = sscanf(readstring, "%*s %u %u", &src, &freq);
if (parsed < 2)
{
fast_serial_printf("invalid request\r\n");
}
else
{
if (freq >= 150 * MHZ)
{
vreg_set_voltage(VREG_VOLTAGE_1_30);
}
if (freq < 150 * MHZ)
{
vreg_set_voltage(VREG_VOLTAGE_1_10);
}
if (DEBUG)
{
fast_serial_printf("Got request mode=%u, freq=%u MHz\r\n", src, freq / MHZ);
Expand All @@ -1039,7 +1061,7 @@ void loop()
# if PRAWNBLASTER_PICO_BOARD == 1
if (freq > 133 * MHZ)
# elif PRAWNBLASTER_PICO_BOARD == 2
if (freq > 150 * MHZ)
if (freq > 200 * MHZ)
# else
# error "Unsupported PICO_BOARD"
# endif // PICO_BOARD
Expand Down
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