#include <string.h>
#include <peripheral_clk_config.h>
#include "watch.h"
+#include "spiflash.h"
// 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) {
- watch_enable_spi();
+ spi_flash_init();
+
+ uint8_t buf[3] = {1, 2, 3};
+ flash_enable();
+ spi_flash_command(CMD_ENABLE_WRITE);
+ // note that you will need to erase the sector to write different values later:
+ // spi_flash_sector_command(CMD_SECTOR_ERASE, 0);
+ spi_flash_write_data(0, buf, 3);
+ flash_disable();
}
void app_wake_from_backup(void) {
bool app_loop(void) {
- 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]);
-
- // 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);
+ flash_enable();
+ // should print 1, 2, 3
+ spi_flash_read_data(0, buf, 3);
+ printf("data: %x, %x, %x\n", buf[0], buf[1], buf[2]);
+ flash_disable();
delay_ms(100);
--- /dev/null
+/*
+ * 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_read(const uint8_t *buf, uint16_t length) {
+ io_write(spi_io, buf, length);
+}
+
+void watch_spi_read(uint8_t *buf, uint16_t length) {
+ io_read(spi_io, buf, length);
+}
$(TOP)/watch-library/hardware/hpl/systick/hpl_systick.c \
$(TOP)/watch-library/shared/driver/lis2dh.c \
$(TOP)/watch-library/shared/driver/lis2dw.c \
+ $(TOP)/watch-library/shared/driver/spiflash.c \
$(TOP)/watch-library/shared/watch/watch_private_display.c \
$(TOP)/watch-library/shared/watch/watch_utility.c \
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) {
spi_io = NULL;
}
-void watch_spi_send(uint8_t *buf, uint16_t length) {
- io_write(spi_io, buf, length);
+bool watch_spi_write(const uint8_t *buf, uint16_t length) {
+ return !!io_write(spi_io, buf, length);
}
-void watch_spi_receive(uint8_t *buf, uint16_t length) {
- io_read(spi_io, buf, length);
+bool watch_spi_read(uint8_t *buf, uint16_t length) {
+ return !!io_read(spi_io, buf, length);
+}
+
+bool watch_spi_transfer(const uint8_t *data_out, uint8_t *data_in, uint16_t length) {
+ struct spi_xfer xfer;
+ xfer.txbuf = (uint8_t *)data_out;
+ xfer.rxbuf = data_in;
+ xfer.size = length;
+ return !!spi_m_sync_transfer(&SPI_0, &xfer);
}
--- /dev/null
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Joey Castillo
+ *
+ * Ported from MIT-licensed code from CircuitPython
+ * Copyright (c) 2016, 2017 Scott Shawcroft for Adafruit Industries
+ *
+ *
+ * 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 "spiflash.h"
+
+#define SPI_FLASH_FAST_READ false
+
+static void flash_enable(void) {
+ watch_set_pin_level(A3, false);
+}
+
+static void flash_disable(void) {
+ watch_set_pin_level(A3, true);
+}
+
+static bool transfer(uint8_t *command, uint32_t command_length, uint8_t *data_in, uint8_t *data_out, uint32_t data_length) {
+ bool status = watch_spi_write(command, command_length);
+ if (status) {
+ if (data_in != NULL && data_out != NULL) {
+ status = watch_spi_transfer(data_out, data_in, data_length);
+ } else if (data_out != NULL) {
+ status = watch_spi_read(data_out, data_length);
+ } else if (data_in != NULL) {
+ status = watch_spi_write(data_in, data_length);
+ }
+ }
+ flash_disable();
+ return status;
+}
+
+static bool transfer_command(uint8_t command, uint8_t *data_in, uint8_t *data_out, uint32_t data_length) {
+ return transfer(&command, 1, data_in, data_out, data_length);
+}
+
+bool spi_flash_command(uint8_t command) {
+ return transfer_command(command, NULL, NULL, 0);
+}
+
+bool spi_flash_read_command(uint8_t command, uint8_t *data, uint32_t data_length) {
+ return transfer_command(command, NULL, data, data_length);
+}
+
+bool spi_flash_write_command(uint8_t command, uint8_t *data, uint32_t data_length) {
+ return transfer_command(command, data, NULL, data_length);
+}
+
+// Pack the low 24 bits of the address into a uint8_t array.
+static void address_to_bytes(uint32_t address, uint8_t *bytes) {
+ bytes[0] = (address >> 16) & 0xff;
+ bytes[1] = (address >> 8) & 0xff;
+ bytes[2] = address & 0xff;
+}
+
+bool spi_flash_sector_command(uint8_t command, uint32_t address) {
+ uint8_t request[4] = {command, 0x00, 0x00, 0x00};
+ address_to_bytes(address, request + 1);
+ return transfer(request, 4, NULL, NULL, 0);
+}
+
+bool spi_flash_write_data(uint32_t address, uint8_t *data, uint32_t data_length) {
+ uint8_t request[4] = {CMD_PAGE_PROGRAM, 0x00, 0x00, 0x00};
+ // Write the SPI flash write address into the bytes following the command byte.
+ address_to_bytes(address, request + 1);
+ flash_enable();
+ bool status = watch_spi_write(request, 4);
+ if (status) {
+ status = watch_spi_write(data, data_length);
+ }
+ flash_disable();
+ return status;
+}
+
+bool spi_flash_read_data(uint32_t address, uint8_t *data, uint32_t data_length) {
+ uint8_t request[5] = {CMD_READ_DATA, 0x00, 0x00, 0x00};
+ uint8_t command_length = 4;
+ if (SPI_FLASH_FAST_READ) {
+ request[0] = CMD_FAST_READ_DATA;
+ command_length = 5;
+ }
+ // Write the SPI flash read address into the bytes following the command byte.
+ address_to_bytes(address, request + 1);
+ flash_enable();
+ bool status = watch_spi_write(request, command_length);
+ if (status) {
+ status = watch_spi_read(data, data_length);
+ }
+ flash_disable();
+ return status;
+}
+
+void spi_flash_init(void) {
+ gpio_set_pin_level(A3, true);
+ gpio_set_pin_direction(A3, GPIO_DIRECTION_OUT);
+ watch_enable_spi();
+}
--- /dev/null
+/*
+ * MIT License
+ *
+ * Copyright (c) 2022 Joey Castillo
+ *
+ * Ported from MIT-licensed code from CircuitPython
+ * Copyright (c) 2016, 2017 Scott Shawcroft for Adafruit Industries
+ *
+ *
+ * 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.h"
+
+#define CMD_READ_JEDEC_ID 0x9f
+#define CMD_READ_DATA 0x03
+#define CMD_FAST_READ_DATA 0x0B
+#define CMD_SECTOR_ERASE 0x20
+// #define CMD_SECTOR_ERASE CMD_READ_JEDEC_ID
+#define CMD_DISABLE_WRITE 0x04
+#define CMD_ENABLE_WRITE 0x06
+#define CMD_PAGE_PROGRAM 0x02
+// #define CMD_PAGE_PROGRAM CMD_READ_JEDEC_ID
+#define CMD_READ_STATUS 0x05
+#define CMD_READ_STATUS2 0x35
+#define CMD_WRITE_STATUS_BYTE1 0x01
+#define CMD_WRITE_STATUS_BYTE2 0x31
+#define CMD_DUAL_READ 0x3b
+#define CMD_QUAD_READ 0x6b
+#define CMD_ENABLE_RESET 0x66
+#define CMD_RESET 0x99
+#define CMD_WAKE 0xab
+
+bool spi_flash_command(uint8_t command);
+bool spi_flash_read_command(uint8_t command, uint8_t *response, uint32_t length);
+bool spi_flash_write_command(uint8_t command, uint8_t *data, uint32_t length);
+bool spi_flash_sector_command(uint8_t command, uint32_t address);
+bool spi_flash_write_data(uint32_t address, uint8_t *data, uint32_t data_length);
+bool spi_flash_read_data(uint32_t address, uint8_t *data, uint32_t data_length);
+void spi_flash_init(void);
*/
void watch_disable_spi(void);
-/** @brief Sends a series of values to a device on the SPI bus.
+/** @brief Writes 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);
+bool watch_spi_write(const uint8_t *buf, uint16_t length);
-/** @brief Receives a series of values from a device on the SPI bus.
+/** @brief Reads 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);
+bool watch_spi_read(uint8_t *buf, uint16_t length);
+
+/** @brief Reads 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).
+ */
+bool watch_spi_transfer(const uint8_t *data_out, uint8_t *data_in, uint16_t length);
/// @}
#endif
void watch_disable_spi(void) {}
-void watch_spi_send(uint8_t *buf, uint16_t length) {}
+bool watch_spi_write(const uint8_t *buf, uint16_t length) { return false; }
-void watch_spi_receive(uint8_t *buf, uint16_t length) {}
+bool watch_spi_read(uint8_t *buf, uint16_t length) { return false; }
+
+bool watch_spi_transfer(const uint8_t *data_out, uint8_t *data_in, uint16_t length) { return false; }
projects / sensor-watch.git / commitdiff