altos: Provide ISR-based code paths for SPI

[fw/altos] / src / stm / ao_i2c_stm.c

diff --git a/src/stm/ao_i2c_stm.c b/src/stm/ao_i2c_stm.c
index 763ae6cd5c0ec0fefa7074912c19bada14134175..73587aac4fb89319e0c12035c474b32d2fd82f11 100644 (file)
--- a/src/stm/ao_i2c_stm.c
+++ b/src/stm/ao_i2c_stm.c
@@ -32,6 +32,7 @@ struct ao_i2c_stm_info {
 static uint8_t ao_i2c_state[STM_NUM_I2C];
 static uint16_t        ao_i2c_addr[STM_NUM_I2C];
 uint8_t        ao_i2c_mutex[STM_NUM_I2C];
+static void    (*ao_i2c_callback[STM_NUM_I2C])(uint8_t index);
 
 #define AO_STM_I2C_CR1 ((0 << STM_I2C_CR1_SWRST) |     \
                        (0 << STM_I2C_CR1_ALERT) |      \
@@ -182,8 +183,8 @@ static inline void out_dr(char *where, struct stm_i2c *stm_i2c, uint32_t dr) {
        stm_i2c->dr = dr;
 }
 
-uint8_t
-ao_i2c_start(uint8_t index, uint16_t addr)
+void
+ao_i2c_queue_start(uint8_t index, uint16_t addr)
 {
        struct stm_i2c  *stm_i2c = ao_i2c_stm_info[index].stm_i2c;
        uint32_t        sr1, sr2;
@@ -196,9 +197,28 @@ ao_i2c_start(uint8_t index, uint16_t addr)
                AO_STM_I2C_CR1 | (1 << STM_I2C_CR1_START));
        out_cr2("start", stm_i2c,
                AO_STM_I2C_CR2 | (1 << STM_I2C_CR2_ITEVTEN) | (1 << STM_I2C_CR2_ITERREN));
+}
+
+void
+ao_i2c_set_start_callback(uint8_t index, void (*callback)(uint8_t index))
+{
+
+}
+
+uint8_t
+ao_i2c_is_idle(uint8_t index)
+{
+       return ao_i2c_state[index] == I2C_IDLE;
+}
+
+uint8_t
+ao_i2c_start(uint8_t index, uint16_t addr)
+{
+       ao_i2c_queue_start(index, addr);
+
        ao_alarm(1);
        cli();
-       while (ao_i2c_state[index] == I2C_IDLE)
+       while (ao_i2c_is_idle(index))
                if (ao_sleep(&ao_i2c_state[index]))
                        break;
        sei();