hueso/Sensor-Watch
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Activity

watch library: implement SPI

Browse Source
This commit is contained in:
Joey Castillo 2022-01-26 21:32:55 -05:00
parent 1b1bba2de0
commit a11275d84c
8 changed files with 221 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
apps/spi-test/app.c
View File

@ -3,40 +3,10 @@
#include <peripheral_clk_config.h>
#include "watch.h"
// NOTE: as of this writing (10/25/21) there is no SPI controller functionality in the watch library.
// this is a very basic app to confirm that SPI is working, tested with board OSO-MISC-21-001 and a GD25Q16C Flash chip.
// The updated SPI Flash sensor board design is OSO-MISC-21-017 (it's easier to build, 0603 passives instead of 0402's).
struct io_descriptor *io;
struct spi_m_sync_descriptor SPI_0;
// this is a very basic app to confirm that SPI is working, tested with board OSO-MISC-21-017 and a GD25Q16C Flash chip.
void app_init(void) {
// SPI_0_CLOCK_init
hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_CORE, CONF_GCLK_SERCOM3_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_SLOW, CONF_GCLK_SERCOM3_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
hri_mclk_set_APBCMASK_SERCOM3_bit(MCLK);
spi_m_sync_init(&SPI_0, SERCOM3);
// SPI_0_PORT_init
gpio_set_pin_level(A3, true);
gpio_set_pin_direction(A3, GPIO_DIRECTION_OUT);
gpio_set_pin_function(A3, GPIO_PIN_FUNCTION_OFF);
gpio_set_pin_level(A2, false);
gpio_set_pin_direction(A2, GPIO_DIRECTION_OUT);
gpio_set_pin_function(A2, PINMUX_PB02C_SERCOM3_PAD0);
gpio_set_pin_direction(A4, GPIO_DIRECTION_IN);
gpio_set_pin_pull_mode(A4, GPIO_PULL_OFF);
gpio_set_pin_function(A4, PINMUX_PB00C_SERCOM3_PAD2);
gpio_set_pin_level(A1, false);
gpio_set_pin_direction(A1, GPIO_DIRECTION_OUT);
gpio_set_pin_function(A1, PINMUX_PB01C_SERCOM3_PAD3);
spi_m_sync_get_io_descriptor(&SPI_0, &io);
spi_m_sync_enable(&SPI_0);
watch_enable_spi();
}
void app_wake_from_backup(void) {
@ -51,20 +21,23 @@ void app_prepare_for_standby(void) {
void app_wake_from_standby(void) {
}
static uint8_t get_id_command[4] = {0x9F};
bool app_loop(void) {
watch_set_pin_level(A3, false);
io_write(io, get_id_command, 1);
uint8_t get_id_command[1] = {0x9F};
uint8_t buf[3] = {0};
watch_set_pin_level(A3, false);
// should print 0, 0, 0
watch_spi_send(get_id_command, 1);
printf("blank: %x, %x, %x\n", buf[0], buf[1], buf[2]);
io_read(io, buf, 3);
watch_set_pin_level(A3, true);
// should print c8, 40, 15
watch_spi_receive(buf, 3);
printf("ident: %x, %x, %x\n", buf[0], buf[1], buf[2]);
watch_set_pin_level(A3, true);
delay_ms(100);
return false;

2
make.mk
View File

@ -85,6 +85,7 @@ SRCS += \
$(TOP)/watch-library/hardware/watch/watch_adc.c \
$(TOP)/watch-library/hardware/watch/watch_gpio.c \
$(TOP)/watch-library/hardware/watch/watch_i2c.c \
$(TOP)/watch-library/hardware/watch/watch_spi.c \
$(TOP)/watch-library/hardware/watch/watch_uart.c \
$(TOP)/watch-library/hardware/watch/watch_deepsleep.c \
$(TOP)/watch-library/hardware/watch/watch_private.c \
@ -152,6 +153,7 @@ SRCS += \
$(TOP)/watch-library/simulator/watch/watch_adc.c \
$(TOP)/watch-library/simulator/watch/watch_gpio.c \
$(TOP)/watch-library/simulator/watch/watch_i2c.c \
$(TOP)/watch-library/simulator/watch/watch_spi.c \
$(TOP)/watch-library/simulator/watch/watch_uart.c \
$(TOP)/watch-library/simulator/watch/watch_deepsleep.c \
$(TOP)/watch-library/simulator/watch/watch_private.c \

64
watch-library/hardware/hw/driver_init.c
View File

@ -15,6 +15,8 @@ struct slcd_sync_descriptor SEGMENT_LCD_0;
struct i2c_m_sync_desc I2C_0;
struct spi_m_sync_descriptor SPI_0;
void I2C_0_PORT_init(void) {
gpio_set_pin_pull_mode(SDA,
@ -50,6 +52,68 @@ void I2C_0_init(void) {
I2C_0_PORT_init();
}
void SPI_0_PORT_init(void) {
gpio_set_pin_level(A2,
// <y> Initial level
// <id> pad_initial_level
// <false"> Low
// <true"> High
false);
// Set pin direction to output
gpio_set_pin_direction(A2, GPIO_DIRECTION_OUT);
gpio_set_pin_function(A2, PINMUX_PB02C_SERCOM3_PAD0);
// Set pin direction to input
gpio_set_pin_direction(A4, GPIO_DIRECTION_IN);
gpio_set_pin_pull_mode(A4,
// <y> Pull configuration
// <id> pad_pull_config
// <GPIO_PULL_OFF"> Off
// <GPIO_PULL_UP"> Pull-up
// <GPIO_PULL_DOWN"> Pull-down
GPIO_PULL_OFF);
gpio_set_pin_function(A4, PINMUX_PB00C_SERCOM3_PAD2);
gpio_set_pin_level(A1,
// <y> Initial level
// <id> pad_initial_level
// <false"> Low
// <true"> High
false);
// Set pin direction to output
gpio_set_pin_direction(A1, GPIO_DIRECTION_OUT);
gpio_set_pin_function(A1, PINMUX_PB01C_SERCOM3_PAD3);
gpio_set_pin_level(A3,
// <y> Initial level
// <id> pad_initial_level
// <false"> Low
// <true"> High
true);
// Set pin direction to output
gpio_set_pin_direction(A3, GPIO_DIRECTION_OUT);
}
void SPI_0_CLOCK_init(void) {
hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_CORE, CONF_GCLK_SERCOM3_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM3_GCLK_ID_SLOW, CONF_GCLK_SERCOM3_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
hri_mclk_set_APBCMASK_SERCOM3_bit(MCLK);
}
void SPI_0_init(void) {
SPI_0_CLOCK_init();
spi_m_sync_init(&SPI_0, SERCOM3);
SPI_0_PORT_init();
}
void delay_driver_init(void) {
delay_init(SysTick);
}

6
watch-library/hardware/hw/driver_init.h
View File

@ -43,12 +43,18 @@ extern struct i2c_m_sync_desc I2C_0;
extern struct usart_sync_descriptor USART_0;
extern struct spi_m_sync_descriptor SPI_0;
extern struct slcd_sync_descriptor SEGMENT_LCD_0;
void I2C_0_CLOCK_init(void);
void I2C_0_init(void);
void I2C_0_PORT_init(void);
void SPI_0_PORT_init(void);
void SPI_0_CLOCK_init(void);
void SPI_0_init(void);
void delay_driver_init(void);
void EXTERNAL_IRQ_0_init(void);

46
watch-library/hardware/watch/watch_spi.c Normal file
View File

@ -0,0 +1,46 @@
/*
* MIT License
*
* Copyright (c) 2022 Joey Castillo
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "watch_spi.h"
struct io_descriptor *spi_io;
void watch_enable_spi(void) {
SPI_0_init();
spi_m_sync_get_io_descriptor(&SPI_0, &spi_io);
spi_m_sync_enable(&SPI_0);
}
void watch_disable_spi(void) {
spi_m_sync_disable(&SPI_0);
spi_io = NULL;
}
void watch_spi_send(uint8_t *buf, uint16_t length) {
io_write(spi_io, buf, length);
}
void watch_spi_receive(uint8_t *buf, uint16_t length) {
io_read(spi_io, buf, length);
}

1
watch-library/shared/watch/watch.h
View File

@ -60,6 +60,7 @@
#include "watch_adc.h"
#include "watch_gpio.h"
#include "watch_i2c.h"
#include "watch_spi.h"
#include "watch_uart.h"
#include "watch_deepsleep.h"

59
watch-library/shared/watch/watch_spi.h Normal file
View File

@ -0,0 +1,59 @@
/*
* MIT License
*
* Copyright (c) 2022 Joey Castillo
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef _WATCH_SPI_H_INCLUDED
#define _WATCH_SPI_H_INCLUDED
////< @file watch_spi.h
#include "watch.h"
/** @addtogroup spi SPI Controller Driver
* @brief This section covers functions related to the SAM L22's built-in SPI driver, including
* configuring the SPI bus and writing to / reading from devices.
*/
/// @{
/** @brief Enables the SPI peripheral. Call this before attempting to interface with SPI devices.
*/
void watch_enable_spi(void);
/** @brief Disables the SPI peripheral.
*/
void watch_disable_spi(void);
/** @brief Sends a series of values to a device on the SPI bus.
* @param buf A series of unsigned bytes; the data you wish to transmit.
* @param length The number of bytes in buf that you wish to send.
* @note This function does not manage the chip select pin (usually A3).
*/
void watch_spi_send(uint8_t *buf, uint16_t length);
/** @brief Receives a series of values from a device on the SPI bus.
* @param buf Storage for the incoming bytes; on return, it will contain the received data.
* @param length The number of bytes that you wish to receive.
* @note This function does not manage the chip select pin (usually A3).
*/
void watch_spi_receive(uint8_t *buf, uint16_t length);
/// @}
#endif

33
watch-library/simulator/watch/watch_spi.c Normal file
View File

@ -0,0 +1,33 @@
/*
* MIT License
*
* Copyright (c) 2022 Joey Castillo
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "watch_spi.h"
void watch_enable_spi(void) {}
void watch_disable_spi(void) {}
void watch_spi_send(uint8_t *buf, uint16_t length) {}
void watch_spi_receive(uint8_t *buf, uint16_t length) {}