diff options
Diffstat (limited to 'main/i2c.c')
| -rw-r--r-- | main/i2c.c | 35 |
1 files changed, 29 insertions, 6 deletions
@@ -8,15 +8,31 @@ #include "i2c.h" #include "pb-mod.h" -#include "pbdrv.h" #include "config.h" #include "pb-buf.h" #include "pb-send.h" static pb_global_state_t _global_state = PB_GS_IDLE; pb_puzzle_module_t modules[CFG_PB_MOD_MAX]; +// stolen from lib/pico-sdk/src/rp2_common/hardware_i2c/i2c.c +#define i2c_reserved_addr(addr) (((addr) & 0x78) == 0 || ((addr) & 0x78) == 0x78) 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++) { + if (i2c_reserved_addr(addr)) continue; + if (addr == PB_MOD_ADDR) continue; + + pb_i2c_send(addr, (uint8_t *) buf.data, buf.size); + } + + pb_buf_free(&buf); +} + static void state_exchange() { @@ -74,19 +90,26 @@ 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(); // wait 1 second - pb_mod_blocking_delay_ms(1e3); + vTaskDelay(1e3 / portTICK_PERIOD_MS); } } +/** + * \ingroup main_pb_override + * \anchor main_route_cmd_magic_res + * + * This function registers the I2C address of the puzzle module that replied to + * the \c MAGIC \c REQ command into a list of "known puzzle modules", which are + * then periodically updated during gameplay. + * + * \note Up to \ref CFG_PB_MOD_MAX puzzle modules can be registered + * simultaniously. + */ void pb_route_cmd_magic_res(pb_msg_t * msg) { if (modules_size == CFG_PB_MOD_MAX) return; pb_puzzle_module_t tmp_module = {msg->sender, PB_GS_NOINIT}; |