1 files changed, 0 insertions, 57 deletions
diff --git a/stm-fmc.c b/stm-fmc.c
index 1987ebe..c5086b4 100644
--- a/stm-fmc.c
+++ b/stm-fmc.c
@@ -164,60 +164,3 @@ void fmc_init(void)
     // initialize fmc
     HAL_SRAM_Init(&_fmc_fpga_inst, &fmc_timing, NULL);
 }
-
-
-static HAL_StatusTypeDef _fmc_nwait_idle(void)
-{
-    int cnt;
-
-    // poll NWAIT (number of iterations is limited)
-    for (cnt=0; cnt<FMC_FPGA_NWAIT_MAX_POLL_TICKS; cnt++)
-    {
-        // read pin state
-        if (HAL_GPIO_ReadPin(FMC_GPIO_PORT_NWAIT, FMC_GPIO_PIN_NWAIT) == FMC_NWAIT_IDLE)
-            return HAL_OK;
-    }
-
-    return HAL_ERROR;
-}
-
-HAL_StatusTypeDef fmc_write_32(uint32_t addr, uint32_t *data)
-{
-    // calculate target fpga address
-    uint32_t *ptr = (uint32_t *) (FMC_FPGA_BASE_ADDR + (addr & FMC_FPGA_ADDR_MASK));
-
-    // write data to fpga
-   *ptr = *data;
-
-   // wait for transaction to complete
-    return _fmc_nwait_idle();
-}
-
-HAL_StatusTypeDef fmc_read_32(uint32_t addr, uint32_t *data)
-{
-    // calculate target fpga address
-    uint32_t *ptr = (uint32_t *) (FMC_FPGA_BASE_ADDR + (addr & FMC_FPGA_ADDR_MASK));
-
-    /* Pavel says:
-     * The short story is like, on one hand STM32 has a dedicated FMC_NWAIT
-     * pin, that can be used in variable-latency data transfer mode. On the
-     * other hand STM32 also has a very nasty hardware bug associated with
-     * FMC_WAIT, that causes processor to freeze under certain conditions.
-     * Because of this FMC_NWAIT cannot be used and FPGA can't properly signal
-     * to STM32, when data transfer is done. Because of that we have to read
-     * two times.
-     */
-
-    HAL_StatusTypeDef status;
-
-    *data = *ptr;
-    status = _fmc_nwait_idle();
-
-    if (status != HAL_OK)
-        return status;
-
-    *data = *ptr;
-    status = _fmc_nwait_idle();
-
-    return status;
-}