From cec52af586fd05250da07d97ec219a000cfa8baa Mon Sep 17 00:00:00 2001
From: Giovanni Mangano <giovanni@MacBook-Pro-di-Giovanni.local>
Date: Fri, 7 Mar 2025 14:32:22 +0100
Subject: [PATCH] CRC OK with gps, bitreversed
---
.vscode/settings.json | 7 +++++-
GPS/GPS.c | 6 ++---
GPS/pio.pio | 10 +++-----
PA_PIO.c | 10 +++++---
PIO_XOR/CMakeLists.txt | 2 +-
PIO_XOR/pio_xor.c | 31 ++++++-----------------
PIO_XOR/pio_xor.h | 1 +
PIO_XOR/pio_xor.pio | 56 ++++++++++++++++++++++++++++++++++++------
PIO_XOR/test.pio | 32 ++++++++++++++++++++++++
9 files changed, 110 insertions(+), 45 deletions(-)
create mode 100644 PIO_XOR/test.pio
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 992389d..21b26d2 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -35,5 +35,10 @@
"raspberry-pi-pico.cmakeAutoConfigure": true,
"raspberry-pi-pico.useCmakeTools": false,
"raspberry-pi-pico.cmakePath": "${HOME}/.pico-sdk/cmake/v3.29.9/bin/cmake",
- "raspberry-pi-pico.ninjaPath": "${HOME}/.pico-sdk/ninja/v1.12.1/ninja"
+ "raspberry-pi-pico.ninjaPath": "${HOME}/.pico-sdk/ninja/v1.12.1/ninja",
+ "files.associations": {
+ "xosc.h": "c",
+ "gps.h": "c",
+ "pio_xor.h": "c"
+ }
}
diff --git a/GPS/GPS.c b/GPS/GPS.c
index 803e25e..2264dc8 100644
--- a/GPS/GPS.c
+++ b/GPS/GPS.c
@@ -262,8 +262,8 @@ int gps_init( PIO pio, uint32_t baudrate){
irq_add_shared_handler(PIO0_IRQ_0, pio_irq0_gps_handler, PICO_SHARED_IRQ_HANDLER_DEFAULT_ORDER_PRIORITY);
irq_set_enabled(PIO0_IRQ_0, true);
/* Shift registers configuration */
- sm_config_set_in_shift(&c, true, false, 8);
- sm_config_set_out_shift(&c, true, false, 8);
+ sm_config_set_in_shift(&c, true, true, 8);
+ sm_config_set_out_shift(&c, true, true, 8);
/* Associates the pins connected to "in" instruction */
sm_config_set_in_pins(&c, DATA_PIN);
/* Write configuration to the State Machine */
@@ -273,7 +273,7 @@ int gps_init( PIO pio, uint32_t baudrate){
/* Write the separator (that will trigger an interrupt) */
pio_sm_put(gps_pio, gps_sm, '\n');
printf("------- Initialized GPS SM\n");
- init_nmea_dma(gps_sm);
+ //init_nmea_dma(gps_sm);
return gps_sm;
}
diff --git a/GPS/pio.pio b/GPS/pio.pio
index 092bf0b..6d5c246 100644
--- a/GPS/pio.pio
+++ b/GPS/pio.pio
@@ -1,20 +1,18 @@
.program pio
- pull BLOCK ; Get initial argument: Delimiter char
out X, 32 ; Copy this char in X scratch register
.wrap_target
skip:
wait 0 PIN 0 [31]; Wait Start bit
;set PINS 0b010 [31] ; Let the start bit pass before sampling
- set Y, 6 [15] ; Sample in the middle of data bits
+ set Y, 7 [15] ; Sample in the middle of data bits
read_bit:
+ irq clear 4
in PINS 1 [31] ; Read a single data bit, then wait for one period
jmp Y-- read_bit ; Repeat 7 time
- in PINS 1 ; Read the last bit
- in NULL, 24 ; Fill the rest with zeroes
+ ;in NULL, 24 ; Fill the rest with zeroes
wait 1 PIN 0 ; Wait stop bit
mov Y, ISR
- push ; Send the received Byte to the FIFO
jmp X!=Y skip ; Repeat reception if not end of Packet
- irq WAIT (0) ; Generate IRQ if end of Packet
+ ;irq WAIT 0 ; Generate IRQ if end of Packet
.wrap
\ No newline at end of file
diff --git a/PA_PIO.c b/PA_PIO.c
index 4cf4cbe..58a37b9 100644
--- a/PA_PIO.c
+++ b/PA_PIO.c
@@ -5,17 +5,21 @@
#include "comparator/comparator.h"
#include "hardware/pio.h"
#include "PIO_XOR/pio_xor.h"
-
+#include "hardware/sync.h"
int main()
{
stdio_init_all();
sleep_ms(2000);
- // gps_init(pio0, 9600);
+ int gps_sm = gps_init(pio0, 9600);
// comparator_init(pio0, 1000, 2);
test_pio_xor();
+ char rx_gps = 0;
while (true) {
- tight_loop_contents();
+ pio_sm_put_blocking(pio0, 1, rx_gps);
+ printf("for input 0b00: %x\n", pio_sm_get_blocking(pio0,1));
+ rx_gps = pio_sm_get_blocking(pio0, gps_sm)>>24;
+ printf("received %c\n", rx_gps);
}
}
diff --git a/PIO_XOR/CMakeLists.txt b/PIO_XOR/CMakeLists.txt
index 9ee859f..4d4b3c9 100644
--- a/PIO_XOR/CMakeLists.txt
+++ b/PIO_XOR/CMakeLists.txt
@@ -9,6 +9,6 @@ target_include_directories(PIO_XOR PUBLIC
"${PROJECT_SOURCE_DIR}/build/"
)
-target_link_libraries(PIO_XOR pico_stdlib hardware_pio hardware_dma hardware_gpio hardware_timer)
+target_link_libraries(PIO_XOR pico_stdlib hardware_pio hardware_dma hardware_gpio hardware_timer hardware_adc)
pico_generate_pio_header(PIO_XOR ${PROJECT_SOURCE_DIR}/PIO_XOR/pio_xor.pio)
diff --git a/PIO_XOR/pio_xor.c b/PIO_XOR/pio_xor.c
index eeffbeb..5ae8a63 100644
--- a/PIO_XOR/pio_xor.c
+++ b/PIO_XOR/pio_xor.c
@@ -1,34 +1,19 @@
#include "pio_xor.h"
void test_pio_xor(void){
- sleep_ms(1000);
uint sm = pio_claim_unused_sm(pio0, true);
printf("sm = %i\n",sm);
- uint offset = pio_add_program(pio0, &pio_xor_program);
- printf("------- Offset = %x\n", offset);
+ int offset = pio_add_program(pio0, &pio_xor_program);
+ printf("------- Offset = %i\n", offset);
pio_sm_config c = pio_xor_program_get_default_config(offset);
-
- sm_config_set_clkdiv_int_frac8(&c, 1, 0);
+ pio_gpio_init(pio0, 13);
+ pio_sm_set_consecutive_pindirs(pio0, sm, 13, 1, false);
+ sm_config_set_in_pins(&c, 13);
+ sm_config_set_clkdiv_int_frac8(&c, 1, 0);
+ sm_config_set_out_shift(&c, true, false, 8);
+ sm_config_set_in_shift(&c, false, false, 8);
pio_sm_init(pio0, sm, offset, &c);
/* Enable the state machine */
pio_sm_set_enabled(pio0, sm, 1);
- /* Write the separator (that will trigger an interrupt) */
-
- pio_sm_put(pio0, sm, 0b1110010011100100);
-
- printf("for input 0b11: %x\n", pio_sm_get_blocking(pio0,0));
- //pio_sm_put(pio0, sm, 0b10);
- printf("for input 0b10: %x\n", pio_sm_get_blocking(pio0,0));
- //pio_sm_put(pio0, sm, 0b01);
- printf("for input 0b01: %x\n", pio_sm_get_blocking(pio0,0));
- //pio_sm_put(pio0, sm, 0b00);
- printf("for input 0b00: %x\n", pio_sm_get_blocking(pio0,0));
- printf("for input 0b11: %x\n", pio_sm_get_blocking(pio0,0));
- //pio_sm_put(pio0, sm, 0b10);
- printf("for input 0b10: %x\n", pio_sm_get_blocking(pio0,0));
- //pio_sm_put(pio0, sm, 0b01);
- printf("for input 0b01: %x\n", pio_sm_get_blocking(pio0,0));
- //pio_sm_put(pio0, sm, 0b00);
- printf("for input 0b00: %x\n", pio_sm_get_blocking(pio0,0));
}
\ No newline at end of file
diff --git a/PIO_XOR/pio_xor.h b/PIO_XOR/pio_xor.h
index dfe9cd5..5229f6c 100644
--- a/PIO_XOR/pio_xor.h
+++ b/PIO_XOR/pio_xor.h
@@ -5,6 +5,7 @@
#include <string.h>
#include "pico/stdlib.h"
#include "hardware/pio.h"
+#include "hardware/adc.h"
#include "pio_xor.pio.h"
void test_pio_xor(void);
diff --git a/PIO_XOR/pio_xor.pio b/PIO_XOR/pio_xor.pio
index 139dc90..95ea777 100644
--- a/PIO_XOR/pio_xor.pio
+++ b/PIO_XOR/pio_xor.pio
@@ -1,12 +1,18 @@
.program pio_xor
- pull BLOCK
+ ;pull BLOCK
.wrap_target
+ pull IfEmpty
+ repeat:
mov X, ISR ; 1: Copy ISR in X
mov ISR, NULL ; Set ISR to all zeros
- out ISR, 2 ; 2: ISR[0] = last byte bit, ISR[1] = new byte bit
- mov Y, ISR ; 3: Copy ISR in Y
- ; 4: Computation of XOR
+ irq wait 4 ; Wait pin sampling from uart
+ in PINS, 1
+ out Y, 1 ; 2: ISR[0] = last byte bit, ISR[1] = new byte bit
+ in Y, 1
+ mov Y, ISR ; 3: Copy ISR in Y
+
+ ; 4: Computation of XOR
jmp !Y is_zero ; if Y = 00; out = 0
jmp Y-- once ; decrement once
once:
@@ -26,7 +32,41 @@
send:
mov ISR, X ; 6: Copy X (Last iteration's ISR) into ISR
in Y, 1 ; 7: Push the new byte into ISR
- mov X, ISR ;
- push
- mov ISR, X
-.wrap
\ No newline at end of file
+ jmp !OSRE repeat
+ push
+.wrap
+
+; .program pio_xor
+; .wrap_target
+; pull IFEMPTY ; Changes OSR only when a full byte has been treated
+; mov X, ISR ; 1: Copy ISR in X
+; mov ISR, NULL ; Set ISR to all zeros
+; wait 1 IRQ 5
+; out PINS, 1 ; 2: ISR[1] = new wbyte bit
+; out ISR, 1 ; --- ISR[0] = last byte bit,
+; mov Y, ISR ; 3: Copy ISR in Y
+; ; 4: Computation of XOR
+
+; jmp !Y is_zero ; if Y = 00; out = 0
+; jmp Y-- once ; decrement once
+; once:
+; jmp !Y is_one
+; jmp Y-- twice ; decrement twice
+; twice:
+; jmp !Y is_one ; If Y-2 <= 0 ; out = 1
+; jmp is_zero ; else out = 0
+
+; is_zero:
+; set Y, 0
+; jmp send
+; is_one:
+; set Y, 1
+; jmp send
+
+; send:
+; mov ISR, X ; 6: Copy X (Last iteration's ISR) into ISR
+; in Y, 1 ; 7: Push the new byte into ISR
+; mov X, ISR ;
+; push IFFULL; should setup autopush instead
+; mov ISR, X
+; .wrap
\ No newline at end of file
diff --git a/PIO_XOR/test.pio b/PIO_XOR/test.pio
new file mode 100644
index 0000000..42353c5
--- /dev/null
+++ b/PIO_XOR/test.pio
@@ -0,0 +1,32 @@
+.program pio_xor
+ pull BLOCK
+.wrap_target
+ mov X, ISR ; 1: Copy ISR in X
+ mov ISR, NULL ; Set ISR to all zeros
+ out ISR, 2 ; 2: ISR[0] = last byte bit, ISR[1] = new byte bit
+ mov Y, ISR ; 3: Copy ISR in Y
+ ; 4: Computation of XOR
+
+ jmp !Y is_zero ; if Y = 00; out = 0
+ jmp Y-- once ; decrement once
+ once:
+ jmp !Y is_one
+ jmp Y-- twice ; decrement twice
+ twice:
+ jmp !Y is_one ; If Y-2 <= 0 ; out = 1
+ jmp is_zero ; else out = 0
+
+ is_zero:
+ set Y, 0
+ jmp send
+ is_one:
+ set Y, 1
+ jmp send
+
+ send:
+ mov ISR, X ; 6: Copy X (Last iteration's ISR) into ISR
+ in Y, 1 ; 7: Push the new byte into ISR
+ mov X, ISR ;
+ push
+ mov ISR, X
+.wrap
--
GitLab