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Config option for initialization frequency

pull/7774/head
deepikabhavnani 2018-04-03 13:13:07 -05:00
parent 48bdc8821b
commit d59c80e3f8
1 changed files with 8 additions and 1 deletions
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9
SDBlockDevice.cpp
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@ -159,6 +159,11 @@
#define MBED_CONF_SD_CMD0_IDLE_STATE_RETRIES 5 /*!< Number of retries for sending CMDO */
#endif
#ifndef MBED_CONF_SD_INIT_FREQUENCY
#define MBED_CONF_SD_INIT_FREQUENCY 100000 /*!< Initialization frequency Range (100KHz-400KHz) */
#endif
#define SD_COMMAND_TIMEOUT MBED_CONF_SD_CMD_TIMEOUT
#define SD_CMD0_GO_IDLE_STATE_RETRIES MBED_CONF_SD_CMD0_IDLE_STATE_RETRIES
#define SD_DBG 0 /*!< 1 - Enable debugging */
@ -251,7 +256,9 @@ SDBlockDevice::SDBlockDevice(PinName mosi, PinName miso, PinName sclk, PinName c
_card_type = SDCARD_NONE;
// Set default to 100kHz for initialisation and 1MHz for data transfer
_init_sck = 100000;
MBED_STATIC_ASSERT(((MBED_CONF_SD_INIT_FREQUENCY >= 100000) && (MBED_CONF_SD_INIT_FREQUENCY <= 400000)),
"Initialization frequency should be between 100KHz to 400KHz");
_init_sck = MBED_CONF_SD_INIT_FREQUENCY;
_transfer_sck = hz;
// Only HC block size is supported.