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QSPI driver: fixes after PR 7783 review 

- make QSPI::lock and QSPI::unlock protected
- fix QSPI::_initialize return value
- add assert on QSPI::_initialize failure
- minor comments fixes
pull/7783/head
Maciej Bocianski 2018-08-21 10:05:08 +02:00
parent c94f22c7ad
commit ad49388888
2 changed files with 17 additions and 13 deletions
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11
drivers/QSPI.cpp
View File

@ -1,5 +1,5 @@
/* mbed Microcontroller Library
* Copyright (c) 2006-2013 ARM Limited
* Copyright (c) 2006-2018 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -45,7 +45,8 @@ QSPI::QSPI(PinName io0, PinName io1, PinName io2, PinName io3, PinName sclk, Pin
_initialized = false;
//Go ahead init the device here with the default config
_initialize();
bool success = _initialize();
MBED_ASSERT(success);
}
qspi_status_t QSPI::configure_format(qspi_bus_width_t inst_width, qspi_bus_width_t address_width, qspi_address_size_t address_size, qspi_bus_width_t alt_width, qspi_alt_size_t alt_size, qspi_bus_width_t data_width, int dummy_cycles)
@ -217,8 +218,10 @@ void QSPI::unlock()
// Note: Private helper function to initialize qspi HAL
bool QSPI::_initialize()
{
if (_mode != 0 && _mode != 1)
return QSPI_STATUS_INVALID_PARAMETER;
if (_mode != 0 && _mode != 1) {
_initialized = false;
return _initialized;
}
qspi_status_t ret = qspi_init(&_qspi, _qspi_io0, _qspi_io1, _qspi_io2, _qspi_io3, _qspi_clk, _qspi_cs, _hz, _mode );
if (QSPI_STATUS_OK == ret) {

19
drivers/QSPI.h
View File

@ -1,5 +1,5 @@
/* mbed Microcontroller Library
* Copyright (c) 2006-2015 ARM Limited
* Copyright (c) 2006-2018 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -33,7 +33,7 @@ namespace mbed {
/** A QSPI Driver, used for communicating with QSPI slave devices
*
* The default format is set to Quad-SPI(4-4-4), and a clock frequency of 1MHz
* The default format is set to Quad-SPI(1-1-1), and a clock frequency of 1MHz
* Most QSPI devices will also require Chip Select which is indicated by ssel.
*
* @note Synchronization level: Thread safe
@ -45,7 +45,7 @@ namespace mbed {
* #include "mbed.h"
*
* // hardware ssel (where applicable)
* QSPI qspi_device(p5, p6, p7, p8, p9, p10); // io0, io1, io2, io3, sclk, ssel
* QSPI qspi_device(QSPI_PIN_IO0, QSPI_PIN_IO1, QSPI_PIN_IO2, QSPI_PIN_IO3, QSPI_PIN_SCK, QSPI_PIN_CSN); // io0, io1, io2, io3, sclk, ssel
*
*
* int main() {
@ -84,12 +84,12 @@ public:
/** Configure the data transmission format
*
* @param inst_width Bus width used by instruction phase(Valid values are 1,2,4)
* @param address_width Bus width used by address phase(Valid values are 1,2,4)
* @param address_size Size in bits used by address phase(Valid values are 8,16,24,32)
* @param alt_width Bus width used by alt phase(Valid values are 1,2,4)
* @param alt_size Size in bits used by alt phase(Valid values are 8,16,24,32)
* @param data_width Bus width used by data phase(Valid values are 1,2,4)
* @param inst_width Bus width used by instruction phase(Valid values are QSPI_CFG_BUS_SINGLE, QSPI_CFG_BUS_DUAL, QSPI_CFG_BUS_QUAD)
* @param address_width Bus width used by address phase(Valid values are QSPI_CFG_BUS_SINGLE, QSPI_CFG_BUS_DUAL, QSPI_CFG_BUS_QUAD)
* @param address_size Size in bits used by address phase(Valid values are QSPI_CFG_ADDR_SIZE_8, QSPI_CFG_ADDR_SIZE_16, QSPI_CFG_ADDR_SIZE_24, QSPI_CFG_ADDR_SIZE_32)
* @param alt_width Bus width used by alt phase(Valid values are QSPI_CFG_BUS_SINGLE, QSPI_CFG_BUS_DUAL, QSPI_CFG_BUS_QUAD)
* @param alt_size Size in bits used by alt phase(Valid values are QSPI_CFG_ADDR_SIZE_8, QSPI_CFG_ADDR_SIZE_16, QSPI_CFG_ADDR_SIZE_24, QSPI_CFG_ADDR_SIZE_32)
* @param data_width Bus width used by data phase(Valid values are QSPI_CFG_BUS_SINGLE, QSPI_CFG_BUS_DUAL, QSPI_CFG_BUS_QUAD)
* @param dummy_cycles Number of dummy clock cycles to be used after alt phase
*
*/
@ -171,6 +171,7 @@ public:
*/
qspi_status_t command_transfer(unsigned int instruction, int address, const char *tx_buffer, size_t tx_length, const char *rx_buffer, size_t rx_length);
protected:
/** Acquire exclusive access to this SPI bus
*/
virtual void lock(void);