mordae/pico-sdr
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Experiment with different biasing arrangement

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This commit is contained in:
Jan Hamal Dvořák 2024-02-22 11:20:58 +01:00
parent f8b316a340
commit 94ccab7246
1 changed files with 11 additions and 6 deletions
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17
src/main.c
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@ -92,13 +92,16 @@ static void bias_init(int in_pin, int out_pin)
gpio_set_drive_strength(out_pin, GPIO_DRIVE_STRENGTH_2MA); gpio_set_drive_strength(out_pin, GPIO_DRIVE_STRENGTH_2MA);
const uint16_t insn[] = { const uint16_t insn[] = {
pio_encode_mov_not(pio_pins, pio_pins), pio_encode_mov_not(pio_pins, pio_pins) | pio_encode_sideset(1, 1),
pio_encode_nop() | pio_encode_sideset(1, 0) | pio_encode_delay(0),
pio_encode_mov_not(pio_pins, pio_pins) | pio_encode_sideset(1, 1),
pio_encode_nop() | pio_encode_sideset(1, 0) | pio_encode_delay(1),
}; };
pio_program_t prog = { pio_program_t prog = {
.instructions = insn, .instructions = insn,
.length = 1, .length = sizeof(insn) / sizeof(*insn),
.origin = 31, .origin = 16,
}; };
pio_sm_set_enabled(pio1, 0, false); pio_sm_set_enabled(pio1, 0, false);
@ -109,11 +112,13 @@ static void bias_init(int in_pin, int out_pin)
pio_add_program(pio1, &prog); pio_add_program(pio1, &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_sideset_pins(&pc, out_pin);
sm_config_set_in_pins(&pc, in_pin); sm_config_set_in_pins(&pc, in_pin);
sm_config_set_out_pins(&pc, out_pin, 1); sm_config_set_out_pins(&pc, out_pin, 1);
sm_config_set_set_pins(&pc, out_pin, 1); sm_config_set_set_pins(&pc, out_pin, 1);
sm_config_set_wrap(&pc, prog.origin, prog.origin + prog.length - 1); sm_config_set_wrap(&pc, prog.origin, prog.origin + prog.length - 1);
sm_config_set_clkdiv_int_frac(&pc, 7, 127); sm_config_set_clkdiv_int_frac(&pc, 1, 0);
pio_sm_init(pio1, 0, prog.origin, &pc); pio_sm_init(pio1, 0, prog.origin, &pc);
pio_sm_set_consecutive_pindirs(pio1, 0, out_pin, 1, GPIO_OUT); pio_sm_set_consecutive_pindirs(pio1, 0, out_pin, 1, GPIO_OUT);
@ -134,7 +139,7 @@ static void watch_init(int in_pin)
pio_program_t prog = { pio_program_t prog = {
.instructions = insn, .instructions = insn,
.length = 1, .length = 1,
.origin = 30, .origin = 31,
}; };
pio_sm_set_enabled(pio1, 1, false); pio_sm_set_enabled(pio1, 1, false);
@ -169,7 +174,7 @@ static void send_init(int out_pin)
pio_program_t prog = { pio_program_t prog = {
.instructions = insn, .instructions = insn,
.length = 1, .length = 1,
.origin = 29, .origin = 30,
}; };
pio_sm_set_enabled(pio1, 1, false); pio_sm_set_enabled(pio1, 1, false);