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1,set rp2040 FIFO_MAX_SIZE to 16.ref: pico sdk ->
static inline size_t i2c_get_write_available(i2c_inst_t *i2c) {
const size_t IC_TX_BUFFER_DEPTH = 16;
return IC_TX_BUFFER_DEPTH - i2c_get_hw(i2c)->txflr;
}
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