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spresense: minor changes for i2c, spi and uart #4412

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Merged
merged 2 commits into from
Mar 16, 2021
Merged

spresense: minor changes for i2c, spi and uart #4412

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22ed0ab
spresens: configure pin mode for i2c and spi
kamtom480 Mar 15, 2021
ed3f636
spresense: empty rx uart fifo after initialization
kamtom480 Mar 15, 2021
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2 changes: 2 additions & 0 deletions ports/cxd56/common-hal/busio/I2C.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@
#include <arch/chip/pin.h>
#include <nuttx/i2c/i2c_master.h>
#include <cxd56_i2c.h>
#include <cxd56_pinconfig.h>

#include "py/runtime.h"

Expand All @@ -49,6 +50,7 @@ void common_hal_busio_i2c_construct(busio_i2c_obj_t *self, const mcu_pin_obj_t *
self->sda_pin = sda;
self->frequency = frequency;
self->i2c_dev = cxd56_i2cbus_initialize(0);
CXD56_PIN_CONFIGS(PINCONFS_I2C0);
}

void common_hal_busio_i2c_deinit(busio_i2c_obj_t *self) {
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3 changes: 3 additions & 0 deletions ports/cxd56/common-hal/busio/SPI.c
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@

#include <arch/chip/pin.h>
#include <cxd56_spi.h>
#include <cxd56_pinconfig.h>

#include "py/runtime.h"

Expand All @@ -39,10 +40,12 @@ void common_hal_busio_spi_construct(busio_spi_obj_t *self, const mcu_pin_obj_t *
(mosi == NULL || mosi->number == PIN_SPI4_MOSI) &&
(miso == NULL || miso->number == PIN_SPI4_MISO)) {
port = 4;
CXD56_PIN_CONFIGS(PINCONFS_SPI4);
} else if (clock->number == PIN_EMMC_CLK &&
(mosi == NULL || mosi->number == PIN_EMMC_DATA0) &&
(miso == NULL || miso->number == PIN_EMMC_DATA1)) {
port = 5;
CXD56_PIN_CONFIGS(PINCONFS_EMMCA_SPI5);
}

if (port < 0) {
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11 changes: 11 additions & 0 deletions ports/cxd56/common-hal/busio/UART.c
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Expand Up @@ -59,6 +59,9 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
uint32_t baudrate, uint8_t bits, busio_uart_parity_t parity, uint8_t stop,
mp_float_t timeout, uint16_t receiver_buffer_size, byte* receiver_buffer,
bool sigint_enabled) {
int i;
int count;
char tmp;
struct termios tio;

if ((rts != NULL) || (cts != NULL) || (rs485_dir != NULL) || (rs485_invert)) {
Expand Down Expand Up @@ -96,6 +99,14 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
if (busio_uart_dev[self->number].fd < 0) {
mp_raise_ValueError(translate("Could not initialize UART"));
}

// Wait to make sure the UART is ready
usleep(1000);
// Clear RX FIFO
ioctl(busio_uart_dev[self->number].fd, FIONREAD, (long unsigned int)&count);
for (i = 0; i < count; i++) {
read(busio_uart_dev[self->number].fd, &tmp, 1);
}
}

ioctl(busio_uart_dev[self->number].fd, TCGETS, (long unsigned int)&tio);
Expand Down