fix: harden ch390 rx protocol handling

2026-04-29 04:36:17 +08:00
parent 60d2af0a27
commit a6040e7d68
4 changed files with 32 additions and 20 deletions
@@ -283,25 +283,16 @@ uint8_t ch390_read_reg(uint8_t reg)

 static uint8_t ch390_read_rx_reg(uint8_t reg)
 {
-    uint8_t tx_buf[3];
-    uint8_t rx_buf[3];
-
-    tx_buf[0] = OPC_MEM_DMY_R;
-    tx_buf[1] = reg;
-    tx_buf[2] = 0x00u;
+    uint8_t value;

    CH390_SPI_ATOMIC_ENTER();
    ch390_cs(0);
-    if (HAL_SPI_TransmitReceive(&hspi1, tx_buf, rx_buf, 3, SPI_TIMEOUT) != HAL_OK)
-    {
-        ch390_cs(1);
-        CH390_SPI_ATOMIC_EXIT();
-        return 0u;
-    }
+    ch390_spi_exchange_byte(reg | OPC_REG_R);
+    value = ch390_spi_dummy_read();
    ch390_cs(1);
    CH390_SPI_ATOMIC_EXIT();

-    return rx_buf[2];
+    return value;
 }

 uint8_t ch390_read_mrcmdx(void)