127 128 129 void application() { using namespace hal::literals; 25 26 222 namespace hal::lpc40 { class spi: public hal:: spi 27 { 130 28 public: 131 hal::cortex_m:: dwt_counter steady_clock( 29 132 p_cpu_frequency: hal::lpc40::get_frequency (p_peripheral: hal::lpc40:: peripheral::cpu 30 /// Information used to configure the spi bus struct bus_info 133 31 { 134 std::array uart_buffer{}; 32 135 hal::lpc40::uart uart0(0, uart_buffer); 33 /// peripheral id used to power on the spi peripheral at creation peripheral peripheral_id; 136 34 /// spi data pin 137 hal::lpc40::spi spi2(2); 35 pin clock; 138 hal::lpc40::output_pin chip_select(1, 10); 36 /// spi clock pin 139 hal::lpc40::output_pin chip_select_mirror(1, 14); 37 pin data_out; 140 chip_select. level(true); 38 /// spi clock pin 141 39 pin data_in; 142 hal::print(uarto, "Starting SPI Application...\n"); 40 /// clock function code 143 41 std::uint8_t clock_function; 144 while (true) { 42 145 using namespace std:: literals; 43 146 147 std::array payload{ 0xDE, 0xAD, 0xBE, 0xEF }; std::array buffer{}; 44 45 /// scl pin function code std::uint8_t data_out_function; /// scl pin function code std::uint8_t data_in_function; 148 46 }; 149 hal:: print(uart0, "Write operation\n"); 47 150 151 152 153 154 155 156 157 hal::write(spi2, payload); hal::delay(steady_clock, 1s); hal::print(uarto, "Read operation: [ "); hal::read(spi2, buffer); for (const auto& byte : buffer) { hal::print<32>(uart0, "0x%02x", byte); 48 /** 49 * @brief Construct a new spi object 50 * 51 * @param p_bus - bus number to use 52 * @param p_settings - spi settings to achieve 53 * @throws hal::operation_not_supported - if the p_bus is not 0, 1, or 2 or if 54 * the spi settings could not be achieved. 55 */ 158 } 56 spi(std::uint8_t p_bus, const spi::settings& p_settings = = {}); 159 57 ** 160 161 162 163 164 165 166 167 hal::print(uarto, "]\n"); hal::delay(steady_clock, 1s); hal::print(uartØ, "Full-duplex transfer\n"); spi2.transfer (payload, buffer); hal::delay(steady_clock, 1s); hal:: print(uarto, "Half-duplex transfer\n"); 58 * @brief Construct a new spi object using bus info directly 59 * 60 * @param p_bus - Full bus information 61 62 spi(bus_info p_bus); 63 64 spi(spi& p_other) = delete; 65 spi& operator= (spi& p_other) = delete; 168 169 hal::write_then_read(spi2, payload, buffer); hal::delay(steady_clock, 1s); 66 spi(spi&& p_other) noexcept = delete; 67 170 68 spi& operator= (spi&& p_other) noexcept = delete; ~spi(); 171 { 69 172 173 std::array read_manufacturer_id{ hal::byte{ 0x9F } }; std::array id_data{}; 70 private: 71 174 72 175 chip_select.level(false); 73 void driver_configure(const settings & p_settings) override; void driver_transfer(std::span p_data_out, std::span p_data_in, www www 176 bal delay(steady clock 250ns).

127 128 129 void application() { using namespace hal::literals; 25 26 222 namespace hal::lpc40 { class spi: public hal:: spi 27 { 130 28 public: 131 hal::cortex_m:: dwt_counter steady_clock( 29 132 p_cpu_frequency: hal::lpc40::get_frequency (p_peripheral: hal::lpc40:: peripheral::cpu 30 /// Information used to configure the spi bus struct bus_info 133 31 { 134 std::array uart_buffer{}; 32 135 hal::lpc40::uart uart0(0, uart_buffer); 33 /// peripheral id used to power on the spi peripheral at creation peripheral peripheral_id; 136 34 /// spi data pin 137 hal::lpc40::spi spi2(2); 35 pin clock; 138 hal::lpc40::output_pin chip_select(1, 10); 36 /// spi clock pin 139 hal::lpc40::output_pin chip_select_mirror(1, 14); 37 pin data_out; 140 chip_select. level(true); 38 /// spi clock pin 141 39 pin data_in; 142 hal::print(uarto, "Starting SPI Application...\n"); 40 /// clock function code 143 41 std::uint8_t clock_function; 144 while (true) { 42 145 using namespace std:: literals; 43 146 147 std::array payload{ 0xDE, 0xAD, 0xBE, 0xEF }; std::array buffer{}; 44 45 /// scl pin function code std::uint8_t data_out_function; /// scl pin function code std::uint8_t data_in_function; 148 46 }; 149 hal:: print(uart0, "Write operation\n"); 47 150 151 152 153 154 155 156 157 hal::write(spi2, payload); hal::delay(steady_clock, 1s); hal::print(uarto, "Read operation: [ "); hal::read(spi2, buffer); for (const auto& byte : buffer) { hal::print<32>(uart0, "0x%02x", byte); 48 /** 49 * @brief Construct a new spi object 50 * 51 * @param p_bus - bus number to use 52 * @param p_settings - spi settings to achieve 53 * @throws hal::operation_not_supported - if the p_bus is not 0, 1, or 2 or if 54 * the spi settings could not be achieved. 55 */ 158 } 56 spi(std::uint8_t p_bus, const spi::settings& p_settings = = {}); 159 57 ** 160 161 162 163 164 165 166 167 hal::print(uarto, "]\n"); hal::delay(steady_clock, 1s); hal::print(uartØ, "Full-duplex transfer\n"); spi2.transfer (payload, buffer); hal::delay(steady_clock, 1s); hal:: print(uarto, "Half-duplex transfer\n"); 58 * @brief Construct a new spi object using bus info directly 59 * 60 * @param p_bus - Full bus information 61 62 spi(bus_info p_bus); 63 64 spi(spi& p_other) = delete; 65 spi& operator= (spi& p_other) = delete; 168 169 hal::write_then_read(spi2, payload, buffer); hal::delay(steady_clock, 1s); 66 spi(spi&& p_other) noexcept = delete; 67 170 68 spi& operator= (spi&& p_other) noexcept = delete; ~spi(); 171 { 69 172 173 std::array read_manufacturer_id{ hal::byte{ 0x9F } }; std::array id_data{}; 70 private: 71 174 72 175 chip_select.level(false); 73 void driver_configure(const settings & p_settings) override; void driver_transfer(std::span p_data_out, std::span p_data_in, www www 176 bal delay(steady clock 250ns).

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Related questions

Question

In firmware development if I wanted to develop a driver for the SSD1331, what is the thought process in reading the datasheet? As in what things should I look for in the data sheet? How do I also correspond to what registers on the SSD1331 display with the registers on the board, and what if that board does not have a DC register? What are other ways of analyzing if they have a DC pin but its not called DC?

Can you simplify a clear detailed explanation of how I would use SPI to interact with SSD1331 if there are multiple buses that SPI can read from?

Reference to the example image. Using this open-source framework that has a SPI driver.