Diff: hal/mbed_compat.c

Revision:

1:9db0e321a9f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hal/mbed_compat.c	Tue Dec 31 06:02:27 2019 +0000
@@ -0,0 +1,93 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "analogin_api.h"
+#include "i2c_api.h"
+#include "spi_api.h"
+#include "gpio_api.h"
+#include "mbed_toolchain.h"
+
+// To be re-implemented in the target layer if required
+MBED_WEAK void gpio_free(gpio_t *obj)
+{
+    // Do nothing
+}
+
+#if DEVICE_I2C
+// To be re-implemented in the target layer if required
+MBED_WEAK void i2c_free(i2c_t *obj)
+{
+    // Do nothing
+}
+#endif
+
+#if DEVICE_ANALOGIN
+// To be re-implemented in the target layer if required
+MBED_WEAK void analogin_free(analogin_t *obj)
+{
+    // Do nothing
+}
+#endif
+
+#if DEVICE_SPI
+// Default SPI capabilities. If specific target has different capabilities this function needs to be re-implemented.
+MBED_WEAK void spi_get_capabilities(PinName ssel, bool slave, spi_capabilities_t *cap)
+{
+    if (slave) {
+        cap->minimum_frequency = 200000;            // 200 kHz
+        cap->maximum_frequency = 2000000;           // 2 MHz
+        cap->word_length = 0x00008080;              // 8 and 16 bit symbols
+        cap->support_slave_mode = false;            // to be determined later based on ssel
+        cap->hw_cs_handle = false;                  // irrelevant in slave mode
+        cap->slave_delay_between_symbols_ns = 2500; // 2.5 us
+        cap->clk_modes = 0x0f;                      // all clock modes
+#if DEVICE_SPI_ASYNCH
+        cap->async_mode = true;
+#else
+        cap->async_mode = false;
+#endif
+    } else {
+        cap->minimum_frequency = 200000;          // 200 kHz
+        cap->maximum_frequency = 2000000;         // 2 MHz
+        cap->word_length = 0x00008080;            // 8 and 16 bit symbols
+        cap->support_slave_mode = false;          // to be determined later based on ssel
+        cap->hw_cs_handle = false;                // to be determined later based on ssel
+        cap->slave_delay_between_symbols_ns = 0;  // irrelevant in master mode
+        cap->clk_modes = 0x0f;                    // all clock modes
+#if DEVICE_SPI_ASYNCH
+        cap->async_mode = true;
+#else
+        cap->async_mode = false;
+#endif
+    }
+
+    // check if given ssel pin is in the cs pinmap
+    const PinMap *cs_pins = spi_master_cs_pinmap();
+    PinName pin = NC;
+    while (cs_pins->pin != NC) {
+        if (cs_pins->pin == ssel) {
+#if DEVICE_SPISLAVE
+            cap->support_slave_mode = true;
+#endif
+            cap->hw_cs_handle = true;
+            break;
+        }
+        cs_pins++;
+    }
+}
+
+#endif
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