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Initial commit

This commit is contained in:
gamblor21 2021-02-03 16:30:29 -06:00
parent 24f4d981bd
commit c6aaab6f64
2 changed files with 155 additions and 6 deletions
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152
ports/raspberrypi/common-hal/displayio/ParallelBus.c
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@ -32,37 +32,177 @@
#include "py/runtime.h"
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "bindings/rp2pio/StateMachine.h"
#include "common-hal/rp2pio/StateMachine.h"
static const uint16_t parallel_program[] = {
// .wrap_target
// out pins, 8
// set pins 0
//0x6008,
//0xe001
// .wrap
0x6008,
0xB042
};
void common_hal_displayio_parallelbus_construct(displayio_parallelbus_obj_t* self,
const mcu_pin_obj_t* data0, const mcu_pin_obj_t* command, const mcu_pin_obj_t* chip_select,
const mcu_pin_obj_t* write, const mcu_pin_obj_t* read, const mcu_pin_obj_t* reset) {
mp_raise_NotImplementedError(translate("ParallelBus not yet supported"));
// TODO: Implement with PIO and DMA.
uint8_t data_pin = data0->number;
mp_printf(&mp_plat_print, "data pin %d\n", data_pin);
for (uint8_t i = 0; i < 8; i++) {
if (!pin_number_is_free(data_pin + i)) {
mp_raise_ValueError_varg(translate("Bus pin %d is already in use"), i);
}
}
uint8_t write_pin = write->number;
mp_printf(&mp_plat_print, "write pin %d\n", write_pin);
if (!pin_number_is_free(write_pin)) {
mp_raise_ValueError_varg(translate("Bus pin %d is already in use"), write_pin);
}
self->command.base.type = &digitalio_digitalinout_type;
common_hal_digitalio_digitalinout_construct(&self->command, command);
common_hal_digitalio_digitalinout_switch_to_output(&self->command, true, DRIVE_MODE_PUSH_PULL);
self->chip_select.base.type = &digitalio_digitalinout_type;
common_hal_digitalio_digitalinout_construct(&self->chip_select, chip_select);
common_hal_digitalio_digitalinout_switch_to_output(&self->chip_select, true, DRIVE_MODE_PUSH_PULL);
//self->write.base.type = &digitalio_digitalinout_type;
//common_hal_digitalio_digitalinout_construct(&self->write, write);
//common_hal_digitalio_digitalinout_switch_to_output(&self->write, true, DRIVE_MODE_PUSH_PULL);
self->read.base.type = &digitalio_digitalinout_type;
common_hal_digitalio_digitalinout_construct(&self->read, read);
common_hal_digitalio_digitalinout_switch_to_output(&self->read, true, DRIVE_MODE_PUSH_PULL);
self->data0_pin = data_pin;
self->reset.base.type = &mp_type_NoneType;
if (reset != NULL) {
self->reset.base.type = &digitalio_digitalinout_type;
common_hal_digitalio_digitalinout_construct(&self->reset, reset);
common_hal_digitalio_digitalinout_switch_to_output(&self->reset, true, DRIVE_MODE_PUSH_PULL);
never_reset_pin_number(reset->number);
common_hal_displayio_parallelbus_reset(self);
}
never_reset_pin_number(command->number);
never_reset_pin_number(chip_select->number);
never_reset_pin_number(write->number);
never_reset_pin_number(read->number);
for (uint8_t i = 0; i < 8; i++) {
never_reset_pin_number(data_pin + i);
}
uint32_t pin_usage = 0;
for (int pin_number = 2; pin_number < 10; pin_number ++) {
pin_usage += (1 << pin_number);
}
pin_usage += (1 << write_pin);
mp_printf(&mp_plat_print, "pin usage %x\n", pin_usage);
//uint8_t pin_number = digitalinout->pin->number;
bool ok = rp2pio_statemachine_construct(&self->state_machine,
parallel_program, sizeof(parallel_program) / sizeof(parallel_program[0]),
48000000, //125000000, // freq 24Mhz
NULL, 0, // init
data0, 8, // first out pin, # out pins
NULL, 0, // first in pin, # in pins
NULL, 0, // first set pin
write, 1, // first sideset pin
pin_usage, // pins we use
true, // tx fifo
false, // rx fifo
true, 8, true, // TX, auto pull every 8 bits. shift left to output msb first
false, 32, true, // RX setting we don't use
false); // claim pins
if (!ok) {
// Do nothing. Maybe bitbang?
return;
}
mp_printf(&mp_plat_print, "ok %d\n", ok);
mp_printf(&mp_plat_print, "smvalues: %d %d %d\n", self->state_machine.state_machine, self->state_machine.pins, self->state_machine.actual_frequency);
}
void common_hal_displayio_parallelbus_deinit(displayio_parallelbus_obj_t* self) {
for (uint8_t i = 0; i < 8; i++) {
reset_pin_number(self->data0_pin + i);
}
reset_pin_number(self->command.pin->number);
reset_pin_number(self->chip_select.pin->number);
reset_pin_number(self->write.pin->number);
reset_pin_number(self->read.pin->number);
reset_pin_number(self->reset.pin->number);
}
bool common_hal_displayio_parallelbus_reset(mp_obj_t obj) {
return false;
displayio_parallelbus_obj_t* self = MP_OBJ_TO_PTR(obj);
if (self->reset.base.type == &mp_type_NoneType) {
return false;
}
common_hal_digitalio_digitalinout_set_value(&self->reset, false);
common_hal_mcu_delay_us(4);
common_hal_digitalio_digitalinout_set_value(&self->reset, true);
return true;
}
bool common_hal_displayio_parallelbus_bus_free(mp_obj_t obj) {
return false;
return true;
}
bool common_hal_displayio_parallelbus_begin_transaction(mp_obj_t obj) {
return false;
displayio_parallelbus_obj_t* self = MP_OBJ_TO_PTR(obj);
common_hal_digitalio_digitalinout_set_value(&self->chip_select, false);
return true;
}
void common_hal_displayio_parallelbus_send(mp_obj_t obj, display_byte_type_t byte_type,
display_chip_select_behavior_t chip_select, const uint8_t *data, uint32_t data_length) {
displayio_parallelbus_obj_t* self = MP_OBJ_TO_PTR(obj);
/*mp_printf(&mp_plat_print, "send bt %d cs %d dl %d data: ", byte_type, chip_select, data_length);
int max = 8;
if (data_length < max)
max = data_length;
for (int i = 0; i < max; i++) {
mp_printf(&mp_plat_print, "%x ", data[i]);
}*/
common_hal_digitalio_digitalinout_set_value(&self->command, byte_type == DISPLAY_DATA);
//mp_printf(&mp_plat_print, ".");
//for (int i = 0; i < data_length; i++) {
//common_hal_digitalio_digitalinout_set_value(&self->write, 0);
//pio_sm_put_blocking(self->state_machine.pio, self->state_machine.state_machine, *data);
//common_hal_digitalio_digitalinout_set_value(&self->write, 1);
//mp_printf(&mp_plat_print, "%x", *data);
//data++;
//}
//pio_sm_put_blocking(self->state_machine.pio, self->state_machine.state_machine, 255);
//bool success = common_hal_rp2pio_statemachine_write(&self->state_machine, data, data_length);
//common_hal_mcu_delay_us(50000);
//pio_sm_put_blocking(self->state_machine.pio, self->state_machine.state_machine, 0);
//common_hal_mcu_delay_us(50000);
bool success = common_hal_rp2pio_statemachine_write(&self->state_machine, data, data_length);
//mp_printf(&mp_plat_print, "%d", success);
//mp_printf(&mp_plat_print, ",");
}
void common_hal_displayio_parallelbus_end_transaction(mp_obj_t obj) {
displayio_parallelbus_obj_t* self = MP_OBJ_TO_PTR(obj);
common_hal_digitalio_digitalinout_set_value(&self->chip_select, true);
}

9
ports/raspberrypi/common-hal/displayio/ParallelBus.h
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@ -28,9 +28,18 @@
#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_DISPLAYIO_PARALLELBUS_H
#include "common-hal/digitalio/DigitalInOut.h"
#include "bindings/rp2pio/StateMachine.h"
#include "common-hal/rp2pio/StateMachine.h"
typedef struct {
mp_obj_base_t base;
digitalio_digitalinout_obj_t command;
digitalio_digitalinout_obj_t chip_select;
digitalio_digitalinout_obj_t reset;
digitalio_digitalinout_obj_t write;
digitalio_digitalinout_obj_t read;
uint8_t data0_pin;
rp2pio_statemachine_obj_t state_machine;
} displayio_parallelbus_obj_t;
#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_DISPLAYIO_PARALLELBUS_H