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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-04-30 07:52:35 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-04-30 07:52:35 +0000 |
| commit | 2e7866f634ddf31530c0c83ff8bdfc3b75f42e82 (patch) | |
| tree | bc1b6fade3107edfe7dca873c0626d46b3354647 /os/hal/platforms/STM32/sdc_lld.c | |
| parent | 699789a7227a90c7b4b8cbcf91fe4cbad2de9132 (diff) | |
| download | ChibiOS-2e7866f634ddf31530c0c83ff8bdfc3b75f42e82.tar.gz ChibiOS-2e7866f634ddf31530c0c83ff8bdfc3b75f42e82.tar.bz2 ChibiOS-2e7866f634ddf31530c0c83ff8bdfc3b75f42e82.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2905 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/platforms/STM32/sdc_lld.c')
| -rw-r--r-- | os/hal/platforms/STM32/sdc_lld.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32/sdc_lld.c b/os/hal/platforms/STM32/sdc_lld.c index 48f8561f9..25c7b6897 100644 --- a/os/hal/platforms/STM32/sdc_lld.c +++ b/os/hal/platforms/STM32/sdc_lld.c @@ -120,6 +120,72 @@ void sdc_lld_stop(SDCDriver *sdcp) { }
/**
+ * @brief Starts the SDIO clock and sets it to init mode (400KHz or less).
+ *
+ * @param[in] sdcp pointer to the @p SDCDriver object
+ *
+ * @notapi
+ */
+void sdc_lld_start_clk(SDCDriver *sdcp) {
+
+ (void)sdcp;
+ /* Initial clock setting: 400KHz, 1bit mode.*/
+ SDIO->CLKCR = STM32_SDIO_DIV_LS;
+ SDIO->POWER |= SDIO_POWER_PWRCTRL_0 | SDIO_POWER_PWRCTRL_1;
+ SDIO->CLKCR |= SDIO_CLKCR_CLKEN;
+}
+
+/**
+ * @brief Sets the SDIO clock to data mode (25MHz or less).
+ *
+ * @param[in] sdcp pointer to the @p SDCDriver object
+ *
+ * @notapi
+ */
+void sdc_lld_set_data_clk(SDCDriver *sdcp) {
+
+ (void)sdcp;
+ SDIO->CLKCR = (SDIO->CLKCR & 0xFFFFFF00) | STM32_SDIO_DIV_HS;
+}
+
+/**
+ * @brief Stops the SDIO clock.
+ *
+ * @param[in] sdcp pointer to the @p SDCDriver object
+ *
+ * @notapi
+ */
+void sdc_lld_stop_clk(SDCDriver *sdcp) {
+
+ (void)sdcp;
+ SDIO->CLKCR = 0;
+ SDIO->POWER = 0;
+}
+
+/**
+ * @brief Switches the bus to 4 bits mode.
+ *
+ * @param[in] sdcp pointer to the @p SDCDriver object
+ *
+ * @notapi
+ */
+void sdc_lld_set_bus_mode(SDCDriver *sdcp, sdcbusmode_t mode) {
+ uint32_t clk = SDIO->CLKCR & ~SDIO_CLKCR_WIDBUS;
+
+ (void)sdcp;
+ switch (mode) {
+ case SDC_MODE_1BIT:
+ SDIO->CLKCR = clk;
+ break;
+ case SDC_MODE_4BIT:
+ SDIO->CLKCR = clk | SDIO_CLKCR_WIDBUS_0;
+ break;
+ case SDC_MODE_8BIT:
+ SDIO->CLKCR = clk | SDIO_CLKCR_WIDBUS_1;
+ }
+}
+
+/**
* @brief Sends an SDIO command with no response expected.
*
* @param[in] sdcp pointer to the @p SDCDriver object
|