mordae/pico-sdr
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Update for simpler AFE

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This commit is contained in:
Jan Hamal Dvořák 2025-07-03 19:28:52 +02:00
parent 68c65fdb54
commit 2195c46dbf
1 changed files with 5 additions and 12 deletions
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17
src/main.c
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@ -29,8 +29,8 @@
#define INIT_GAIN 127 #define INIT_GAIN 127
#define LO_PIN 9 #define LO_PIN 9
#define RX_PIN 13 #define RX_PIN 10
#define FB_PIN 5 #define FB_PIN 11
#define PSU_PIN 23 #define PSU_PIN 23
#define PIO pio1 #define PIO pio1
@ -161,17 +161,12 @@ static void init_fb()
gpio_disable_pulls(FB_PIN); gpio_disable_pulls(FB_PIN);
pio_gpio_init(PIO, FB_PIN); pio_gpio_init(PIO, FB_PIN);
// NOTE: Not sure if this is ideal.
hw_set_bits(&PIO->input_sync_bypass, 1u << RX_PIN);
gpio_set_input_hysteresis_enabled(RX_PIN, false); gpio_set_input_hysteresis_enabled(RX_PIN, false);
gpio_set_drive_strength(FB_PIN, GPIO_DRIVE_STRENGTH_2MA); gpio_set_drive_strength(FB_PIN, GPIO_DRIVE_STRENGTH_2MA);
gpio_set_slew_rate(FB_PIN, GPIO_SLEW_RATE_SLOW); gpio_set_slew_rate(FB_PIN, GPIO_SLEW_RATE_SLOW);
const uint16_t insn[] = { const uint16_t insn[] = {
pio_encode_mov_not(pio_pins, pio_pins) | pio_encode_sideset(1, 1) | pio_encode_mov_not(pio_pins, pio_pins) | pio_encode_delay(3),
pio_encode_delay(0),
//pio_encode_nop() | pio_encode_sideset(1, 0) | pio_encode_delay(0),
}; };
pio_program_t prog = { pio_program_t prog = {
@ -187,11 +182,9 @@ static void init_fb()
origin_fb = pio_add_program(PIO, &prog); origin_fb = pio_add_program(PIO, &prog);
pio_sm_config pc = pio_get_default_sm_config(); pio_sm_config pc = pio_get_default_sm_config();
sm_config_set_sideset(&pc, 1, false, true);
sm_config_set_in_pins(&pc, RX_PIN); sm_config_set_in_pins(&pc, RX_PIN);
sm_config_set_out_pins(&pc, FB_PIN, 1); sm_config_set_out_pins(&pc, FB_PIN, 1);
sm_config_set_set_pins(&pc, FB_PIN, 1); sm_config_set_set_pins(&pc, FB_PIN, 1);
sm_config_set_sideset_pins(&pc, FB_PIN);
sm_config_set_wrap(&pc, origin_fb, origin_fb + prog.length - 1); sm_config_set_wrap(&pc, origin_fb, origin_fb + prog.length - 1);
sm_config_set_clkdiv_int_frac(&pc, 1, 0); sm_config_set_clkdiv_int_frac(&pc, 1, 0);
pio_sm_init(PIO, SM_FB, origin_fb, &pc); pio_sm_init(PIO, SM_FB, origin_fb, &pc);
@ -288,9 +281,9 @@ static void init_ad()
static void lo_generate_phase(uint32_t *buf, size_t len, uint32_t step, uint32_t phase) static void lo_generate_phase(uint32_t *buf, size_t len, uint32_t step, uint32_t phase)
{ {
for (size_t i = 0; i < len; i++) { uint32_t bits = 0;
uint32_t bits = 0;
for (size_t i = 0; i < len; i++) {
for (int j = 0; j < 32; j++) { for (int j = 0; j < 32; j++) {
bits <<= 1; bits <<= 1;
bits |= phase >> 31; bits |= phase >> 31;