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Starter. Ware 0. 2. User Guide Texas Instruments Wiki. NOTE  For updated document please refer online wiki page http processors. A COM port redirector tty port redirector under UnixLinux is specialized software often including device driver and user application that includes the underlying. Starter. Ware0. 2. UserGuide. Before starting to use the drivers and applications please read information on how to build and use Starter. Ware package. Starter. Ware examples print messages on the UART Serial Console running on the host. Hence, a serial terminal application like Tera TermHyper. Find-Linux-Working-Directory.png' alt='Php Serial Port Communication Linux Commands' title='Php Serial Port Communication Linux Commands' />Users guide for the Pololu Micro Maestro 6channel USB Servo Controller and the Pololu Mini Maestro 12 18 and 24Channel USB Servo Controllers. We employ two UART boards in the course, one which can be connected to the serial connector of the PC UARTRS232, and a second that can be connected to a USB port. I am trying to use PuTTY to communicate over my computers serial line. I have configured the correct serial line, baud rate, number of data bits, stop bits, parity. Setting Raspberry Pi up for serial communications. Mosrite Ventures Guitar Serial Numbers there. In order to use the Pis serial port for anything else than as a console, you first need to disable getty the. Terminalminicom should be running on the host. The host serial port is configured at 1. Please ensure that the local echo setting for the terminal is turned off. System Configuration. An AM3. 35x So. C integrates a Cortex A8 core which can act as the overall system controller, a Cortex M3 core to manage entryexit of various power down modes, associated memories and peripherals. This section describes the guidelines for programming on the AM3. So. C System. The ARM Subsystem. Starter. Ware exports APIs for configuring Cortex A8 to operate in privileged mode or non privileged mode and APIs to configure MMU and Cache. The APIs for configuration of the CPU can be found in includearmv. MMU can be found in includearmv. APIs for configuration and maintanance operations of cache can be found in includearmv. Features Not Supported. Security extension features. Programming Guidelines. Applications can execute in privileged or non privileged user mode of ARM. On entry to the main function of application, the system will be in privileged mode. However, the application can switch to nonprivileged mode user mode using CPUSwitch. To. User. Mode and back to privileged mode using CPUSwitch. To. Privileged. Mode at any point of time. While executing in user mode, the application shall not access system resources which needs privileged access. The privileged mode used in Starter. Ware is system mode of Cortex A8 core. Note that all ISRs will be executing in privileged mode. Branch prediction is enabled by default during initialization. Separate APIs are provided for enablingdisabling instruction and data cache. Also, APIs are given for invalidation and cleaning of caches. Invalidating a cache will clear it of any stored data. Cleaning a cache will force it to write the dirty values to main memory. Note that MMU Memory Management Unit shall be enabled before enabling the data cache. Starter. Ware supports one level of paging with one to one mapping. That is, virtual address will be equal to physical address. However, we can define separate regions with its own desired attributes like cache policies, access permissions etc. The application shall define the master page table. MMUInit will initialize the master page table with fault entries. REGION. With the help of this, we can specify each memory region with intended attributes such as section, start address, number of pages, memory type, number of pages in the region, security type and access permissions. MMUMem. Region. Map will update the page table for a memory region. After the desired regions are mapped, MMU can be enabled using MMUEnable. The APIs for configuring MMU are exported in includearmv. The file also describes the parameters passed to the APIs. Starter. Ware exports APIs for Cache maintanance operations. Cache. EnableDisable APIs can be used to enabledisable Caches. For maintaining cache coherency for non shareable memory, cache maintanance operations are provided. For example, Cache. Data. Invalidate. All can be used to invalidate the contents of Data Cache and Cache. Data. Clean. All can be used to write all the contents of Data Cache to memory to make the Data Cache and memory coherent. The APIs for cache operations and the parameter description are exported in includearmv. Please refer to ARM Architecture Reference Manual for more information on ARMv. The document discusses concepts of Memory Management Unit, Memory Attributes, Caches and their effect on the performance in detail. Interrupt Controller. AM3. 35x uses Cortex A8 interrupt controller as an interface between different peripherals of the system and the Cortex A8 core interrupt lines. The Host Cortex A8 Interrupt Controller is responsible for prioritizing all service requests from the system peripherals and generating either n. IRQ or n. FIQ to the host. It has the capability to handle up to 1. A8 n. FIQ or n. IRQ interrupt requests, priority 0 being the highest. Note that the So. C doesnt support routing of interrupts to FIQ. The API functions exported are listed in includearmv. Note  Starter. Ware implements only Prioritized IRQ Handler. However, if prioritization is not desired, all interrupts can be assigned the same priority level. For example, if all interrupts in an application are assigned priority level 0, no IRQ preemption will occur. Prioritized IRQ Handler Execution Sequence. Save ARM Core Register Context IRQ is disabled in CPSR by the ARM core on jumping to the IRQ vector. Save the current IRQ threshold value. We need to change this for preventing any same or lower priority interrupt happening. Get the active IRQ priority and set it as the new threshold value. Enable new IRQ Generation at INTC. Here we acknowledge the IRQ and INTC can generate a new IRQ anytime. Enable IRQ generation in CPSR of ARM core and switch to System mode of ARM core All ISR will be executed in System mode. Get the vector table and jump to the ISR of active IRQ. The link register is programmed to return here after executing ISR. Return from the ISR. Disable IRQ generation in CPSR of ARM core and switch back to IRQ mode We have the context saved in IRQ stack. Restore the threshold value. Restore ARM Core Register Context and return from IRQ handler. Features Not Supported. Routing of interrupts to FIQ Security extension features in the interrupt controller. Programming Guidelines. Interrupt Service Routines are part of the application. The application shall decide the priority level to be assigned for each interrupt. Also, there should be a registered interrupt service routine for each system interrupts enabled for processing. The following sequence can be used to set up the Cortex A8 interrupt controller for a system interrupt. Initialize the Cortex A8 interrupt controller using Int. AINTCInit. This will reset the interrupt controller. Register the ISR using Int. Register. After this point, when an interrupt is generated, the control will reach the ISR if the interrupt processing is enabled at the peripheral and interrupt controller. Set the system interrupt priority and the required host interrupt generation controller using Int. Priority. Set. The interrupt shall be routed to IRQ. Enable the system interrupt at AINTC using Int. System. Enable. Enable IRQ in CPSR using Int. Master. IRQEnableThe API Int. Raw. Status. Get can be used to read the raw status of a system interrupt and Int. Pending. Irq. Masked. Status. Get API can be used to read the masked status of interrupts routed to IRQ. Example Configurations. Example Configurations For Interrupt Controller. The uart. Echo examplesevm. AM3. 35xuart application demonstrates the interrupt handling for UART interrupts. The sample application uses UART0 peripheral to demonstrate interrupt processing. The UART0 system interrupt is mapped to host interrupt line IRQ. UART0. Isr is the Interrupt Service Routine registered for this system interrupt. The irq. Preemption examplesevm. AM3. 35xirqpreemption application demonstrates IRQ preemption by assigning different priority levels to UART, RTC and Timer interrupts. Bluetooth to RS2. Serial Adapter 1 Port Female BL 8. Brainboxes. NRND Not Recommended for New Designs. This product is not recommended for new designs. However the device, continues to be in production to support existing customers. Brainboxes encourages designers to consider our alternative products for new designs. Brainboxes guarantees to keep this part in production until 2. June 1st. And will continue to offer lifetime product support. Volume users please contact salesbrainboxes.