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Ladies no.1 detective agency code#
Ladies no.1 detective agency series#

Timer1_attachInterrupt(onTime) // Add ISR Function Prescaler can equal the below values and needs the relevant bits setting (timer speed(Hz)) = (Arduino clock speed(16MHz)) / prescaler compareMatchReg = - 1ĬompareMatchReg = - 1ĬompareMatchReg = - 1 = 15624Īs this is > 256 Timer 1 Must be used for this.ĬompareMatchReg = 15624 // preload timer from calc above Set compareMatchReg to the correct value for our interrupt interval ! Remember ! that when you use timers 0 and 2 this number must be less than 256, and less than 65536 for timer1

Ladies no.1 detective agency code#

The prescaler allows this to be scaled to allow longer intervals.įor AVR boards the compare match register also needs configuring, and is worked through in the code below fully.Ĭompare match register = - 1 The prescaler is used, as the timers can only store up to 8/16 bits in their counters, meaning they would overflow every 256/16000000 s (16us) for 8 bit counters, and 65536 / 16000000 s (4us) for 16 bit counters, which is often far more than needed.

The ISR is then configured to fire after a specific number of ticks.

The prescaler / divider is what the above frequency is divided by to form a "tick" of the timer (increment its counter). Timer speed (Hz) = Timer clock speed (Mhz) / prescaler These vary board to board, and some common boards are listed below: The Mega boards have Timers 3,4,5 which may be used instead CalculationsĪs these timers are hardware based, all timing is related to the clock of the timer. Timer2 - An 8 bit timer used by the Tone() library Timer1 - A 16 bit timer used by the Servo() library Timer0 - An 8 bit timer used by Arduino functions delay(), millis() and micros(). NOTE - Timer interrupts may interfere with other functionality (PWM for example) depending on the timer chosen to configure.Ġ (Used by WiFi), 1 is available to configure.Į.g.

can only set values to variables declared with VOLATILE, which ensures they arent optimized away, and can be used reliably in the ISR and in the main loop() code.

are restricted to a small number of timers depending on the MCU hardware in use.

only fire when the configured timer overflows.

need to be extremely fast to execute, and it is often best to simply set a number of flags or states within the Interrupt Service Routine, then evaluate them when required in your normal thread code in loop().

The concepts of how they work is the same however accross all platforms. NOTE - the configuration of these varies from platform to platform, and may involve very different code to the below. They are so called as they will intterupt the thread of execution after the current instruction completes, and run their code, returning to the next instruction from where it left off when it has finished. These are similar to external interrupts, but instead of firing on an external event, they fire on a timer. which becomes virtually impossible without using Timer Interrupts. 1 Ladies’ Detective Agency received two Booker Judges’ Special Recommendations and was voted one of the International Books of the Year and the Millennium by the Times Literary Supplement.There are times when you need something to happen, on time, every time. But the case that tugs at her heart, and lands her in danger, is a missing eleven-year-old boy, who may have been snatched by witchdoctors.

Ladies no.1 detective agency series#

1 Ladies Detective Agency series tells the story of the delightfully cunning and enormously engaging Precious Ramotswe, who is drawn to her profession to “help people with problems in their lives.” Immediately upon setting up shop in a small storefront in Gaborone, she is hired to track down a missing husband, uncover a con man, and follow a wayward daughter. This first novel in Alexander McCall Smith’s widely acclaimed The No. In this charming series, Mma Ramotswe-with help from her loyal associate, Grace Makutsi-navigates her cases and her personal life with wisdom, good humor, and the occasional cup of tea.

1 Ladies’ Detective Agency series and its proprietor, Precious Ramotswe, Botswana’s premier lady detective. 1 LADIES’ DETECTIVE AGENCY - Book 1įans around the world adore the best-selling No.