extern/i2c_puppet
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Improvements commited 2 months later (I really should leave notes for myself)

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This commit is contained in:
arturo182
2021-11-03 19:28:01 +01:00
parent c9791af550
commit 04604f3a1c
11 changed files with 433 additions and 271 deletions
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130
app/puppet_i2c.c
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@ -1,19 +1,11 @@
#include "puppet_i2c.h"
#include "app_config.h"
#include "backlight.h"
#include "fifo.h"
#include "gpioexp.h"
#include "keyboard.h"
#include "reg.h"
#include <hardware/i2c.h>
#include <hardware/irq.h>
#include <pico/stdlib.h>
#include <RP2040.h>
#include <stdio.h>
#define WRITE_MASK (1 << 7)
#define REG_ID_INVALID 0x00
static i2c_inst_t *i2c_instances[2] = { i2c0, i2c1 };
@ -32,124 +24,6 @@ static struct
uint8_t write_len;
} self;
static void process_read(void)
{
const bool is_write = (self.read_buffer.reg & WRITE_MASK);
const uint8_t reg = (self.read_buffer.reg & ~WRITE_MASK);
// printf("read complete, is_write: %d, reg: 0x%02X\r\n", is_write, reg);
switch (reg) {
// common R/W registers
case REG_ID_CFG:
case REG_ID_INT:
case REG_ID_DEB:
case REG_ID_FRQ:
case REG_ID_BKL:
case REG_ID_BK2:
case REG_ID_GIC:
case REG_ID_GIN:
case REG_ID_HLD:
case REG_ID_ADR:
case REG_ID_IND:
case REG_ID_CF2:
{
if (is_write) {
reg_set_value(reg, self.read_buffer.data);
switch (reg) {
case REG_ID_BKL:
case REG_ID_BK2:
backlight_sync();
break;
case REG_ID_ADR:
puppet_i2c_sync_address();
break;
default:
break;
}
} else {
self.write_buffer[0] = reg_get_value(reg);
self.write_len = sizeof(uint8_t);
}
break;
}
// special R/W registers
case REG_ID_DIR: // gpio direction
case REG_ID_PUE: // gpio input pull enable
case REG_ID_PUD: // gpio input pull direction
{
if (is_write) {
switch (reg) {
case REG_ID_DIR:
gpioexp_update_dir(self.read_buffer.data);
break;
case REG_ID_PUE:
gpioexp_update_pue_pud(self.read_buffer.data, reg_get_value(REG_ID_PUD));
break;
case REG_ID_PUD:
gpioexp_update_pue_pud(reg_get_value(REG_ID_PUE), self.read_buffer.data);
break;
}
} else {
self.write_buffer[0] = reg_get_value(reg);
self.write_len = sizeof(uint8_t);
}
break;
}
case REG_ID_GIO: // gpio value
{
if (is_write) {
gpioexp_set_value(self.read_buffer.data);
} else {
self.write_buffer[0] = gpioexp_get_value();
self.write_len = sizeof(uint8_t);
}
break;
}
// read-only registers
case REG_ID_TOX:
case REG_ID_TOY:
self.write_buffer[0] = reg_get_value(reg);
self.write_len = sizeof(uint8_t);
reg_set_value(reg, 0);
break;
case REG_ID_VER:
self.write_buffer[0] = VER_VAL;
self.write_len = sizeof(uint8_t);
break;
case REG_ID_KEY:
self.write_buffer[0] = fifo_count();
self.write_buffer[0] |= keyboard_get_numlock() ? KEY_NUMLOCK : 0x00;
self.write_buffer[0] |= keyboard_get_capslock() ? KEY_CAPSLOCK : 0x00;
self.write_len = sizeof(uint8_t);
break;
case REG_ID_FIF:
{
const struct fifo_item item = fifo_dequeue();
self.write_buffer[0] = (uint8_t)item.state;
self.write_buffer[1] = (uint8_t)item.key;
self.write_len = sizeof(uint8_t) * 2;
break;
}
case REG_ID_RST:
NVIC_SystemReset();
break;
}
}
static void irq_handler(void)
{
// the controller sent data
@ -157,7 +31,7 @@ static void irq_handler(void)
if (self.read_buffer.reg == REG_ID_INVALID) {
self.read_buffer.reg = self.i2c->hw->data_cmd & 0xff;
if (self.read_buffer.reg & WRITE_MASK) {
if (self.read_buffer.reg & PACKET_WRITE_MASK) {
// it'sq a reg write, we need to wait for the second byte before we process
return;
}
@ -165,7 +39,7 @@ static void irq_handler(void)
self.read_buffer.data = self.i2c->hw->data_cmd & 0xff;
}
process_read();
reg_process_packet(self.read_buffer.reg, self.read_buffer.data, self.write_buffer, &self.write_len);
// ready for the next operation
self.read_buffer.reg = REG_ID_INVALID;