130 lines
8.8 KiB
C
130 lines
8.8 KiB
C
// #################################################################################################
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// # << NEORV32: neorv32_neoled.h - Smart LED Interface (NEOLED) HW Driver >> #
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// # ********************************************************************************************* #
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// # BSD 3-Clause License #
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// # #
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// # Copyright (c) 2023, Stephan Nolting. All rights reserved. #
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// # #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # permitted provided that the following conditions are met: #
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// # #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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// # conditions and the following disclaimer. #
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// # #
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// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of #
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// # conditions and the following disclaimer in the documentation and/or other materials #
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// # provided with the distribution. #
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// # #
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// # 3. Neither the name of the copyright holder nor the names of its contributors may be used to #
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// # endorse or promote products derived from this software without specific prior written #
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// # permission. #
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// # #
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// # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS #
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// # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF #
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// # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE #
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// # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, #
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// # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE #
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// # GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED #
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// # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING #
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// # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED #
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// # OF THE POSSIBILITY OF SUCH DAMAGE. #
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// # ********************************************************************************************* #
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// # The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
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// #################################################################################################
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/**********************************************************************//**
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* @file neorv32_neoled.h
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* @brief Smart LED Interface (NEOLED) HW driver header file.
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*
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* @note These functions should only be used if the NEOLED unit was synthesized (IO_NEOLED_EN = true).
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**************************************************************************/
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#ifndef neorv32_neoled_h
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#define neorv32_neoled_h
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/**********************************************************************//**
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* @name IO Device: Smart LED Hardware Interface (NEOLED)
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**************************************************************************/
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/**@{*/
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/** NEOLED module prototype */
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typedef volatile struct __attribute__((packed,aligned(4))) {
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uint32_t CTRL; /**< offset 0: control register */
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uint32_t DATA; /**< offset 4: data register (#NEORV32_NEOLED_CTRL_enum) */
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} neorv32_neoled_t;
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/** NEOLED module hardware access (#neorv32_neoled_t) */
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#define NEORV32_NEOLED ((neorv32_neoled_t*) (NEORV32_NEOLED_BASE))
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/** NEOLED control register bits */
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enum NEORV32_NEOLED_CTRL_enum {
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NEOLED_CTRL_EN = 0, /**< NEOLED control register(0) (r/w): NEOLED global enable */
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NEOLED_CTRL_MODE = 1, /**< NEOLED control register(1) (r/w): TX mode (0=24-bit, 1=32-bit) */
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NEOLED_CTRL_STROBE = 2, /**< NEOLED control register(2) (r/w): Strobe (0=send normal data, 1=send RESET command on data write) */
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NEOLED_CTRL_PRSC0 = 3, /**< NEOLED control register(3) (r/w): Clock prescaler select bit 0 (pulse-clock speed select) */
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NEOLED_CTRL_PRSC1 = 4, /**< NEOLED control register(4) (r/w): Clock prescaler select bit 1 (pulse-clock speed select) */
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NEOLED_CTRL_PRSC2 = 5, /**< NEOLED control register(5) (r/w): Clock prescaler select bit 2 (pulse-clock speed select) */
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NEOLED_CTRL_BUFS_0 = 6, /**< NEOLED control register(6) (r/-): log2(tx buffer size) bit 0 */
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NEOLED_CTRL_BUFS_1 = 7, /**< NEOLED control register(7) (r/-): log2(tx buffer size) bit 1 */
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NEOLED_CTRL_BUFS_2 = 8, /**< NEOLED control register(8) (r/-): log2(tx buffer size) bit 2 */
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NEOLED_CTRL_BUFS_3 = 9, /**< NEOLED control register(9) (r/-): log2(tx buffer size) bit 3 */
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NEOLED_CTRL_T_TOT_0 = 10, /**< NEOLED control register(10) (r/w): pulse-clock ticks per total period bit 0 */
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NEOLED_CTRL_T_TOT_1 = 11, /**< NEOLED control register(11) (r/w): pulse-clock ticks per total period bit 1 */
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NEOLED_CTRL_T_TOT_2 = 12, /**< NEOLED control register(12) (r/w): pulse-clock ticks per total period bit 2 */
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NEOLED_CTRL_T_TOT_3 = 13, /**< NEOLED control register(13) (r/w): pulse-clock ticks per total period bit 3 */
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NEOLED_CTRL_T_TOT_4 = 14, /**< NEOLED control register(14) (r/w): pulse-clock ticks per total period bit 4 */
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NEOLED_CTRL_T_ZERO_H_0 = 15, /**< NEOLED control register(15) (r/w): pulse-clock ticks per ZERO high-time bit 0 */
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NEOLED_CTRL_T_ZERO_H_1 = 16, /**< NEOLED control register(16) (r/w): pulse-clock ticks per ZERO high-time bit 1 */
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NEOLED_CTRL_T_ZERO_H_2 = 17, /**< NEOLED control register(17) (r/w): pulse-clock ticks per ZERO high-time bit 2 */
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NEOLED_CTRL_T_ZERO_H_3 = 18, /**< NEOLED control register(18) (r/w): pulse-clock ticks per ZERO high-time bit 3 */
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NEOLED_CTRL_T_ZERO_H_4 = 19, /**< NEOLED control register(19) (r/w): pulse-clock ticks per ZERO high-time bit 4 */
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NEOLED_CTRL_T_ONE_H_0 = 20, /**< NEOLED control register(20) (r/w): pulse-clock ticks per ONE high-time bit 0 */
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NEOLED_CTRL_T_ONE_H_1 = 21, /**< NEOLED control register(21) (r/w): pulse-clock ticks per ONE high-time bit 1 */
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NEOLED_CTRL_T_ONE_H_2 = 22, /**< NEOLED control register(22) (r/w): pulse-clock ticks per ONE high-time bit 2 */
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NEOLED_CTRL_T_ONE_H_3 = 23, /**< NEOLED control register(23) (r/w): pulse-clock ticks per ONE high-time bit 3 */
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NEOLED_CTRL_T_ONE_H_4 = 24, /**< NEOLED control register(24) (r/w): pulse-clock ticks per ONE high-time bit 4 */
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NEOLED_CTRL_IRQ_CONF = 27, /**< NEOLED control register(27) (r/w): TX FIFO interrupt: 1=IRQ if FIFO is empty, 1=IRQ if FIFO is less than half-full */
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NEOLED_CTRL_TX_EMPTY = 28, /**< NEOLED control register(28) (r/-): TX FIFO is empty */
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NEOLED_CTRL_TX_HALF = 29, /**< NEOLED control register(29) (r/-): TX FIFO is at least half-full */
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NEOLED_CTRL_TX_FULL = 30, /**< NEOLED control register(30) (r/-): TX FIFO is full */
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NEOLED_CTRL_TX_BUSY = 31 /**< NEOLED control register(31) (r/-): busy flag */
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};
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/**@}*/
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/**********************************************************************//**
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* @name Prototypes
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**************************************************************************/
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/**@{*/
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int neorv32_neoled_available(void);
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void neorv32_neoled_setup(uint32_t prsc, uint32_t t_total, uint32_t t_high_zero, uint32_t t_high_one, int irq_mode);
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void neorv32_neoled_setup_ws2812(int irq_mode);
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void neorv32_neoled_set_mode(uint32_t mode);
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void neorv32_neoled_strobe_blocking(void);
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void neorv32_neoled_strobe_nonblocking(void);
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void neorv32_neoled_enable(void);
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void neorv32_neoled_disable(void);
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void neorv32_neoled_write_blocking(uint32_t data);
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uint32_t neorv32_neoled_get_buffer_size(void);
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/**@}*/
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/**********************************************************************//**
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* Send single RGB(W) data word to NEOLED module (non-blocking).
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*
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* @warning This function uses NO busy/flag checks at all!
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*
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* @param[in] data LSB-aligned 24-bit RGB or 32-bit RGBW data
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**************************************************************************/
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inline void __attribute__ ((always_inline)) neorv32_neoled_write_nonblocking(uint32_t data) {
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NEORV32_NEOLED->DATA = data; // send new LED data
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}
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#endif // neorv32_neoled_h
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