cc3200: Rename SD.config() to SD.config_pins().

cc3200/mods/pybsd.c

@@ -49,10 +49,7 @@
 
 #define PYBSD_FREQUENCY_HZ      15000000        // 15MHz
 
-static byte pybsd_pin_d0, pybsd_pin_clk, pybsd_pin_cmd;
-static byte pybsd_af_d0,  pybsd_af_clk,  pybsd_af_cmd;
 static const pin_obj_t   *pybsd_pin_sd_detect;
-static bool               pybsd_pin_config_set;
 static bool               pybsd_is_enabled;
 static bool               pybsd_in_path;
 static FATFS             *sd_fatfs;
@@ -63,20 +60,16 @@ void pybsd_init0 (void) {
     ASSERT ((sd_fatfs = mem_Malloc(sizeof(FATFS))) != NULL);
 }
 
-
 bool pybsd_is_present(void) {
     if (pybsd_pin_sd_detect) {
         return pybsd_is_enabled && MAP_GPIOPinRead(pybsd_pin_sd_detect->port, pybsd_pin_sd_detect->bit);
     }
-    return true;
+    return pybsd_is_enabled;
 }
 
 /******************************************************************************/
 // Micro Python bindings
 //
-// Note: these function are a bit ad-hoc at the moment and are mainly intended
-// for testing purposes.  In the future SD should be a proper class with a
-// consistent interface and methods to mount/unmount it.
 
 /// \method sd_config([value])
 /// Configure the pins used for the sd card.
@@ -91,9 +84,12 @@ bool pybsd_is_present(void) {
 ///
 ///    pyb.SDcard.sd_config_pins (d0_pin, d0_af, clk_pin, clk_af, cmd_pin, cmd_af, card_detect_pin)
 ///
-STATIC mp_obj_t pybsd_config (mp_uint_t n_args, const mp_obj_t *args) {
-    const pin_obj_t *pin = NULL;
+STATIC mp_obj_t pybsd_config_pins (mp_uint_t n_args, const mp_obj_t *args) {
+    byte pybsd_pin_d0, pybsd_pin_clk, pybsd_pin_cmd;
+    byte pybsd_af_d0,  pybsd_af_clk,  pybsd_af_cmd;
+    const pin_obj_t *pin;
 
+    // get all the arguments
     pin = pin_find(args[1]);
     pybsd_pin_d0 = pin->pin_num;
     pybsd_af_d0 = mp_obj_get_int(args[2]);
@@ -106,42 +102,32 @@ STATIC mp_obj_t pybsd_config (mp_uint_t n_args, const mp_obj_t *args) {
     pybsd_pin_cmd = pin->pin_num;
     pybsd_af_cmd = mp_obj_get_int(args[6]);
     pin_verify_af (pybsd_af_cmd);
+
+    // configure the sdhost pins
+    MAP_PinTypeSDHost(pybsd_pin_d0, pybsd_af_d0);
+    MAP_PinTypeSDHost(pybsd_pin_clk, pybsd_af_clk);
+    MAP_PinTypeSDHost(pybsd_pin_cmd, pybsd_af_cmd);
+    MAP_PinDirModeSet(pybsd_pin_clk, PIN_DIR_MODE_OUT);
+    // configure the card detect pin if provided
     if (n_args == 8) {
         pybsd_pin_sd_detect = pin_find(args[7]);
+        pin_config(pybsd_pin_sd_detect, PIN_MODE_0, GPIO_DIR_MODE_IN, PIN_TYPE_STD_PU, PIN_STRENGTH_4MA);
     }
-    pybsd_pin_config_set = true;
 
     return mp_const_none;
 }
-STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pybsd_config_obj, 7, 8, pybsd_config);
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pybsd_config_pins_obj, 7, 8, pybsd_config_pins);
 
 STATIC mp_obj_t pybsd_enable(mp_obj_t self) {
-    if (pybsd_pin_config_set) {
-        // Configure the D0 pin
-        MAP_PinTypeSDHost(pybsd_pin_d0, pybsd_af_d0);
-        // Configure the CLK pin
-        MAP_PinTypeSDHost(pybsd_pin_clk, pybsd_af_clk);
-        // Configure the CMD pin
-        MAP_PinTypeSDHost(pybsd_pin_cmd, pybsd_af_cmd);
-        // Set the SD card clock as an output pin
-        MAP_PinDirModeSet(pybsd_pin_clk, PIN_DIR_MODE_OUT);
-        // Enable SD peripheral clock
-        MAP_PRCMPeripheralClkEnable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
-        // Reset MMCHS
-        MAP_PRCMPeripheralReset(PRCM_SDHOST);
-        // Initialize MMCHS
-        MAP_SDHostInit(SDHOST_BASE);
-        // Configure the card clock
-        MAP_SDHostSetExpClk(SDHOST_BASE, MAP_PRCMPeripheralClockGet(PRCM_SDHOST), PYBSD_FREQUENCY_HZ);
-
-        // Configure the card detect pin (if available)
-        if (pybsd_pin_sd_detect) {
-            pin_config(pybsd_pin_sd_detect, PIN_MODE_0, GPIO_DIR_MODE_IN, PIN_TYPE_STD_PU, PIN_STRENGTH_4MA);
-        }
-    }
-    else {
-        nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_resource_not_avaliable));
-    }
+    // Enable SD peripheral clock
+    MAP_PRCMPeripheralClkEnable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
+    // Reset MMCHS
+    MAP_PRCMPeripheralReset(PRCM_SDHOST);
+    // Initialize MMCHS
+    MAP_SDHostInit(SDHOST_BASE);
+    // Configure the card clock
+    MAP_SDHostSetExpClk(SDHOST_BASE, MAP_PRCMPeripheralClockGet(PRCM_SDHOST), PYBSD_FREQUENCY_HZ);
+
     pybsd_is_enabled = true;
 
     // try to mount the sd card on /SD
@@ -176,7 +162,7 @@ STATIC mp_obj_t pybsd_disable(mp_obj_t self) {
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(pybsd_disable_obj, pybsd_disable);
 
 STATIC const mp_map_elem_t pybsd_locals_dict_table[] = {
-    { MP_OBJ_NEW_QSTR(MP_QSTR_config),          (mp_obj_t)&pybsd_config_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_config_pins),     (mp_obj_t)&pybsd_config_pins_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_enable),          (mp_obj_t)&pybsd_enable_obj },
     { MP_OBJ_NEW_QSTR(MP_QSTR_disable),         (mp_obj_t)&pybsd_disable_obj },
 };

cc3200/qstrdefsport.h

@@ -162,7 +162,7 @@ Q(disable)
 
 // for SD class
 Q(SD)
-Q(config)
+Q(config_pins)
 Q(enable)
 Q(disable)