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// Copyright 2021 Nick Brassel (@tzarc)
// SPDX-License-Identifier: GPL-2.0-or-later
#ifdef QUANTUM_PAINTER_SPI_ENABLE
# include "spi_master.h"
# include "qp_comms_spi.h"
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Base SPI support
bool qp_comms_spi_init(painter_device_t device) {
painter_driver_t * driver = (painter_driver_t *)device;
qp_comms_spi_config_t *comms_config = (qp_comms_spi_config_t *)driver->comms_config;
// Initialize the SPI peripheral
spi_init();
// Set up CS as output high
setPinOutput(comms_config->chip_select_pin);
writePinHigh(comms_config->chip_select_pin);
return true;
}
bool qp_comms_spi_start(painter_device_t device) {
painter_driver_t * driver = (painter_driver_t *)device;
qp_comms_spi_config_t *comms_config = (qp_comms_spi_config_t *)driver->comms_config;
return spi_start(comms_config->chip_select_pin, comms_config->lsb_first, comms_config->mode, comms_config->divisor);
}
uint32_t qp_comms_spi_send_data(painter_device_t device, const void *data, uint32_t byte_count) {
uint32_t bytes_remaining = byte_count;
const uint8_t *p = (const uint8_t *)data;
const uint32_t max_msg_length = 1024;
while (bytes_remaining > 0) {
uint32_t bytes_this_loop = QP_MIN(bytes_remaining, max_msg_length);
spi_transmit(p, bytes_this_loop);
p += bytes_this_loop;
bytes_remaining -= bytes_this_loop;
}
return byte_count - bytes_remaining;
}
void qp_comms_spi_stop(painter_device_t device) {
painter_driver_t * driver = (painter_driver_t *)device;
qp_comms_spi_config_t *comms_config = (qp_comms_spi_config_t *)driver->comms_config;
spi_stop();
writePinHigh(comms_config->chip_select_pin);
}
const painter_comms_vtable_t spi_comms_vtable = {
.comms_init = qp_comms_spi_init,
.comms_start = qp_comms_spi_start,
.comms_send = qp_comms_spi_send_data,
.comms_stop = qp_comms_spi_stop,
};
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// SPI with D/C and RST pins
# ifdef QUANTUM_PAINTER_SPI_DC_RESET_ENABLE
bool qp_comms_spi_dc_reset_init(painter_device_t device) {
if (!qp_comms_spi_init(device)) {
return false;
}
painter_driver_t * driver = (painter_driver_t *)device;
qp_comms_spi_dc_reset_config_t *comms_config = (qp_comms_spi_dc_reset_config_t *)driver->comms_config;
// Set up D/C as output low, if specified
if (comms_config->dc_pin != NO_PIN) {
setPinOutput(comms_config->dc_pin);
writePinLow(comms_config->dc_pin);
}
// Set up RST as output, if specified, performing a reset in the process
if (comms_config->reset_pin != NO_PIN) {
setPinOutput(comms_config->reset_pin);
writePinLow(comms_config->reset_pin);
wait_ms(20);
writePinHigh(comms_config->reset_pin);
wait_ms(20);
}
return true;
}
uint32_t qp_comms_spi_dc_reset_send_data(painter_device_t device, const void *data, uint32_t byte_count) {
painter_driver_t * driver = (painter_driver_t *)device;
qp_comms_spi_dc_reset_config_t *comms_config = (qp_comms_spi_dc_reset_config_t *)driver->comms_config;
writePinHigh(comms_config->dc_pin);
return qp_comms_spi_send_data(device, data, byte_count);
}
void qp_comms_spi_dc_reset_send_command(painter_device_t device, uint8_t cmd) {
painter_driver_t * driver = (painter_driver_t *)device;
qp_comms_spi_dc_reset_config_t *comms_config = (qp_comms_spi_dc_reset_config_t *)driver->comms_config;
writePinLow(comms_config->dc_pin);
spi_write(cmd);
}
void qp_comms_spi_dc_reset_bulk_command_sequence(painter_device_t device, const uint8_t *sequence, size_t sequence_len) {
for (size_t i = 0; i < sequence_len;) {
uint8_t command = sequence[i];
uint8_t delay = sequence[i + 1];
uint8_t num_bytes = sequence[i + 2];
qp_comms_spi_dc_reset_send_command(device, command);
if (num_bytes > 0) {
qp_comms_spi_dc_reset_send_data(device, &sequence[i + 3], num_bytes);
}
if (delay > 0) {
wait_ms(delay);
}
i += (3 + num_bytes);
}
}
const painter_comms_with_command_vtable_t spi_comms_with_dc_vtable = {
.base =
{
.comms_init = qp_comms_spi_dc_reset_init,
.comms_start = qp_comms_spi_start,
.comms_send = qp_comms_spi_dc_reset_send_data,
.comms_stop = qp_comms_spi_stop,
},
.send_command = qp_comms_spi_dc_reset_send_command,
.bulk_command_sequence = qp_comms_spi_dc_reset_bulk_command_sequence,
};
# endif // QUANTUM_PAINTER_SPI_DC_RESET_ENABLE
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#endif // QUANTUM_PAINTER_SPI_ENABLE
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