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Assert NSS from SPI callbacks

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This commit is contained in:
Manuel Bleichenbacher 2022-04-15 12:17:26 +02:00
parent 54a91a27db
commit 0a7353c146
1 changed files with 12 additions and 6 deletions
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18
src/hal/hal_esp32.c
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@ -50,6 +50,8 @@ static int64_t os_time_to_esp_time(int64_t esp_now, uint32_t os_time);
static int64_t get_current_time(); static int64_t get_current_time();
static void init_io(void); static void init_io(void);
static void init_spi(void); static void init_spi(void);
static void assert_nss(spi_transaction_t* trans);
static void deassert_nss(spi_transaction_t* trans);
static void init_timer(void); static void init_timer(void);
static void set_next_alarm(int64_t time); static void set_next_alarm(int64_t time);
@ -217,6 +219,8 @@ void init_spi(void)
.address_bits = 8, .address_bits = 8,
.spics_io_num = -1, .spics_io_num = -1,
.queue_size = 1, .queue_size = 1,
.pre_cb = assert_nss,
.post_cb = deassert_nss,
}; };
esp_err_t ret = spi_bus_add_device(spi_host, &spi_config, &spi_handle); esp_err_t ret = spi_bus_add_device(spi_host, &spi_config, &spi_handle);
@ -227,22 +231,16 @@ void init_spi(void)
void hal_spi_write(u1_t cmd, const u1_t *buf, size_t len) void hal_spi_write(u1_t cmd, const u1_t *buf, size_t len)
{ {
gpio_set_level(pin_nss, 0);
memset(&spi_transaction, 0, sizeof(spi_transaction)); memset(&spi_transaction, 0, sizeof(spi_transaction));
spi_transaction.addr = cmd; spi_transaction.addr = cmd;
spi_transaction.length = 8 * len; spi_transaction.length = 8 * len;
spi_transaction.tx_buffer = buf; spi_transaction.tx_buffer = buf;
esp_err_t err = spi_device_transmit(spi_handle, &spi_transaction); esp_err_t err = spi_device_transmit(spi_handle, &spi_transaction);
ESP_ERROR_CHECK(err); ESP_ERROR_CHECK(err);
gpio_set_level(pin_nss, 1);
} }
void hal_spi_read(u1_t cmd, u1_t *buf, size_t len) void hal_spi_read(u1_t cmd, u1_t *buf, size_t len)
{ {
gpio_set_level(pin_nss, 0);
memset(buf, 0, len); memset(buf, 0, len);
memset(&spi_transaction, 0, sizeof(spi_transaction)); memset(&spi_transaction, 0, sizeof(spi_transaction));
spi_transaction.addr = cmd; spi_transaction.addr = cmd;
@ -252,7 +250,15 @@ void hal_spi_read(u1_t cmd, u1_t *buf, size_t len)
spi_transaction.rx_buffer = buf; spi_transaction.rx_buffer = buf;
esp_err_t err = spi_device_transmit(spi_handle, &spi_transaction); esp_err_t err = spi_device_transmit(spi_handle, &spi_transaction);
ESP_ERROR_CHECK(err); ESP_ERROR_CHECK(err);
}
void IRAM_ATTR assert_nss(spi_transaction_t* trans)
{
gpio_set_level(pin_nss, 0);
}
void IRAM_ATTR deassert_nss(spi_transaction_t* trans)
{
gpio_set_level(pin_nss, 1); gpio_set_level(pin_nss, 1);
} }