diff options
Diffstat (limited to 'main')
| -rw-r--r-- | main/config.def.h | 20 | ||||
| -rw-r--r-- | main/i2c.c | 16 | ||||
| -rw-r--r-- | main/init.c | 12 | ||||
| -rw-r--r-- | main/pbdrv.c | 36 | ||||
| -rw-r--r-- | main/pbdrv.h | 15 |
5 files changed, 45 insertions, 54 deletions
diff --git a/main/config.def.h b/main/config.def.h index 0dae608..b3be5ed 100644 --- a/main/config.def.h +++ b/main/config.def.h @@ -72,13 +72,21 @@ * \name I2C configuration * \{ */ -#ifndef CFG_SDA_PIN -//! I2C SDA pin -#define CFG_SDA_PIN 16 +#ifndef CFG_SDA0_PIN +//! I2C 0 SDA pin +#define CFG_SDA0_PIN 16 #endif -#ifndef CFG_SCL_PIN -//! I2C SCL pin -#define CFG_SCL_PIN 17 +#ifndef CFG_SCL0_PIN +//! I2C 0 SCL pin +#define CFG_SCL0_PIN 17 +#endif +#ifndef CFG_SDA1_PIN +//! I2C 1 SDA pin +#define CFG_SDA1_PIN 18 +#endif +#ifndef CFG_SCL1_PIN +//! I2C 1 SCL pin +#define CFG_SCL1_PIN 19 #endif /// \} @@ -16,6 +16,18 @@ i2c_addr_t modules[CFG_PB_MOD_MAX]; size_t modules_size = 0; +static void bus_scan() { + pb_buf_t buf = pb_send_magic_req(); + + // check for all 7-bit addresses + uint16_t addr_max = 1 << 7; + for (uint16_t addr = 0x00; addr < addr_max; addr++) { + pb_i2c_send(addr, (uint8_t *) buf.data, buf.size); + } + + pb_buf_free(&buf); +} + static void state_exchange() { for (size_t i = 0; i < modules_size; i++) { pb_buf_t buf = pb_send_state_req(); @@ -28,10 +40,6 @@ void bus_task() { // do a scan of the bus bus_scan(); - // FIXME: this should be removed (see handover: RP2040 I2C limitations) - // wait for 5 seconds until all handshake responses are received - pb_mod_blocking_delay_ms(5e3); - while(1) { // send my state to all puzzle modules state_exchange(); diff --git a/main/init.c b/main/init.c index 6d29d19..d85c94d 100644 --- a/main/init.c +++ b/main/init.c @@ -29,11 +29,15 @@ static void init_wifi() { } static void init_i2c() { - gpio_set_function(CFG_SDA_PIN, GPIO_FUNC_I2C); - gpio_set_function(CFG_SCL_PIN, GPIO_FUNC_I2C); + gpio_set_function(CFG_SDA0_PIN, GPIO_FUNC_I2C); + gpio_set_function(CFG_SCL0_PIN, GPIO_FUNC_I2C); + gpio_set_function(CFG_SDA1_PIN, GPIO_FUNC_I2C); + gpio_set_function(CFG_SCL1_PIN, GPIO_FUNC_I2C); - gpio_pull_up(CFG_SDA_PIN); - gpio_pull_up(CFG_SCL_PIN); + gpio_pull_up(CFG_SDA0_PIN); + gpio_pull_up(CFG_SCL0_PIN); + gpio_pull_up(CFG_SDA1_PIN); + gpio_pull_up(CFG_SCL1_PIN); pb_setup(); } diff --git a/main/pbdrv.c b/main/pbdrv.c index 0624897..6a89253 100644 --- a/main/pbdrv.c +++ b/main/pbdrv.c @@ -14,7 +14,9 @@ #include <stdio.h> #include <timers.h> -#define PB_I2C i2c0 +#define PB_I2C_S i2c0 +#define PB_I2C_M i2c1 + #define BUF_SIZE 256 #define MSGS_MAX 4 @@ -32,6 +34,8 @@ static void async_pb_i2c_recv(void * _msg, uint32_t _) { } static void msg_complete(i2c_msg_buf_t * msg) { + return pb_i2c_recv(msg->data, msg->size); + // defer pb_i2c_recv call to FreeRTOS scheduler as pb_i2c_recv takes // too long to return from an ISR xTimerPendFunctionCallFromISR(async_pb_i2c_recv, msg, 0, NULL); @@ -48,7 +52,7 @@ static void recv_event(i2c_inst_t *i2c, i2c_slave_event_t event) { switch (event) { case I2C_SLAVE_RECEIVE: { if (msg->size == BUF_SIZE) return; - msg->data[msg->size++] = i2c_read_byte_raw(PB_I2C); + msg->data[msg->size++] = i2c_read_byte_raw(PB_I2C_S); break; } case I2C_SLAVE_FINISH: { @@ -60,33 +64,15 @@ static void recv_event(i2c_inst_t *i2c, i2c_slave_event_t event) { } void pb_setup() { - i2c_init(PB_I2C, PB_CLOCK_SPEED_HZ); - i2c_slave_init(PB_I2C, PB_MOD_ADDR, &recv_event); + i2c_init(PB_I2C_S, PB_CLOCK_SPEED_HZ); + i2c_init(PB_I2C_M, PB_CLOCK_SPEED_HZ); + + i2c_slave_init(PB_I2C_S, PB_MOD_ADDR, &recv_event); } __weak void pb_i2c_send(i2c_addr_t addr, const uint8_t * buf, size_t sz) { - i2c_set_slave_mode(PB_I2C, false, PB_MOD_ADDR); - // false to write stop condition to i2c bus - i2c_write_timeout_us(PB_I2C, addr, buf, sz, false, PB_TIMEOUT_US); - - i2c_set_slave_mode(PB_I2C, true, PB_MOD_ADDR); -} - -void bus_scan() { - i2c_set_slave_mode(PB_I2C, false, PB_MOD_ADDR); - - pb_buf_t buf = pb_send_magic_req(); - - // check for all 7-bit addresses - uint16_t addr_max = 1 << 7; - for (uint16_t addr = 0x00; addr < addr_max; addr++) { - i2c_write_timeout_us(PB_I2C, addr, (uint8_t *) buf.data, buf.size, false, PB_TIMEOUT_US); - } - - pb_buf_free(&buf); - - i2c_set_slave_mode(PB_I2C, true, PB_MOD_ADDR); + i2c_write_timeout_us(PB_I2C_M, addr, buf, sz, false, PB_TIMEOUT_US); } void pb_mod_blocking_delay_ms(unsigned long ms) { diff --git a/main/pbdrv.h b/main/pbdrv.h index 9496aa9..89a4870 100644 --- a/main/pbdrv.h +++ b/main/pbdrv.h @@ -41,21 +41,6 @@ void pb_setup(); */ void pb_i2c_send(i2c_addr_t addr, const uint8_t * buf, size_t sz); -/** - * \brief Scan the bus for I2C slaves, and send handshake messages to ACK-ing - * slaves. - * - * \note As a result of the RP2040 hardware limitations, this function is also - * implemented in this file, even though it does not belong to the puzzle bus - * driver. - * - * \warning In order to not miss any handshake responses, the bus should remain - * busy during the entire scan. The \c nostop parameter of the \c - * i2c_write_timeout_us() function from the pico-sdk does not seem to keep the - * bus busy. - */ -void bus_scan(); - /// \} #ifdef __cplusplus |