diff options
| author | Damien George <damien.p.george@gmail.com> | 2017-12-14 10:40:35 +1100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2017-12-14 10:43:18 +1100 |
| commit | badaf3ecfe5d0c8158debf4bd0cb1458016c77f4 (patch) | |
| tree | 70846e1eecd3da1bc994d357a6512ff6e8191355 | |
| parent | bb516af1eb97d0c24fa12b00bfde196b3db94c66 (diff) | |
esp8266/machine_hspi: After an SPI write wait for last byte to transfer.
Because otherwise the function can return with data still waiting to be
clocked out, and CS might then be disabled before the SPI transaction is
complete. Fixes issue #3487.
| -rw-r--r-- | ports/esp8266/machine_hspi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/ports/esp8266/machine_hspi.c b/ports/esp8266/machine_hspi.c index 9fd0f4868..ff7728291 100644 --- a/ports/esp8266/machine_hspi.c +++ b/ports/esp8266/machine_hspi.c @@ -65,6 +65,9 @@ STATIC void machine_hspi_transfer(mp_obj_base_t *self_in, size_t len, const uint spi_tx8fast(HSPI, src[i]); ++i; } + // wait for SPI transaction to complete + while (spi_busy(HSPI)) { + } } else { // we need to read and write data |